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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/189836">189836</a></dd>
<dt>Author</dt> <dd>benjamin@webkit.org</dd>
<dt>Date</dt> <dd>2015-09-15 18:31:50 -0700 (Tue, 15 Sep 2015)</dd>
</dl>

<h3>Log Message</h3>
<pre>Style invalidation affecting siblings does not work with inline-style changes
https://bugs.webkit.org/show_bug.cgi?id=149189

Patch by Benjamin Poulain &lt;bpoulain@apple.com&gt; on 2015-09-15
Reviewed by Antti Koivisto.

Source/WebCore:

Style::resolveTree() made the assumption that inline style changes only affect
descendants and should not participate in &quot;StyleRecalcAffectsNextSiblingElementStyle&quot;.
That was wrong. If the inline style change through CSSOM, it can cause the creation
of a style attribute, which is observable through &quot;StyleRecalcAffectsNextSiblingElementStyle&quot;.

This patch removes the incorrect assumption. Style invalidation is always propagated now.

Tests: fast/css/style-attribute-invalidation-propagates-to-counted-siblings.html
       fast/css/style-attribute-invalidation-propagates-to-direct-siblings.html
       fast/css/style-attribute-invalidation-propagates-to-indirect-siblings.html

* css/PropertySetCSSStyleDeclaration.cpp:
(WebCore::InlineCSSStyleDeclaration::didMutate): Deleted.
* dom/StyledElement.cpp:
(WebCore::StyledElement::inlineStyleChanged):
* dom/StyledElement.h:
(WebCore::StyledElement::invalidateStyleAttribute):
Clean up inline-style invalidation a tiny bit.

* style/StyleResolveTree.cpp:
(WebCore::Style::resolveTree):
Fix the bug.

LayoutTests:

* fast/css/style-attribute-invalidation-propagates-to-counted-siblings-expected.txt: Added.
* fast/css/style-attribute-invalidation-propagates-to-counted-siblings.html: Added.
* fast/css/style-attribute-invalidation-propagates-to-direct-siblings-expected.txt: Added.
* fast/css/style-attribute-invalidation-propagates-to-direct-siblings.html: Added.
* fast/css/style-attribute-invalidation-propagates-to-indirect-siblings-expected.txt: Added.
* fast/css/style-attribute-invalidation-propagates-to-indirect-siblings.html: Added.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsChangeLog">trunk/LayoutTests/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCorecssPropertySetCSSStyleDeclarationcpp">trunk/Source/WebCore/css/PropertySetCSSStyleDeclaration.cpp</a></li>
<li><a href="#trunkSourceWebCoredomStyledElementcpp">trunk/Source/WebCore/dom/StyledElement.cpp</a></li>
<li><a href="#trunkSourceWebCoredomStyledElementh">trunk/Source/WebCore/dom/StyledElement.h</a></li>
<li><a href="#trunkSourceWebCorestyleStyleResolveTreecpp">trunk/Source/WebCore/style/StyleResolveTree.cpp</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsfastcssstyleattributeinvalidationpropagatestocountedsiblingsexpectedtxt">trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-counted-siblings-expected.txt</a></li>
<li><a href="#trunkLayoutTestsfastcssstyleattributeinvalidationpropagatestocountedsiblingshtml">trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-counted-siblings.html</a></li>
<li><a href="#trunkLayoutTestsfastcssstyleattributeinvalidationpropagatestodirectsiblingsexpectedtxt">trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-direct-siblings-expected.txt</a></li>
<li><a href="#trunkLayoutTestsfastcssstyleattributeinvalidationpropagatestodirectsiblingshtml">trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-direct-siblings.html</a></li>
<li><a href="#trunkLayoutTestsfastcssstyleattributeinvalidationpropagatestoindirectsiblingsexpectedtxt">trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-indirect-siblings-expected.txt</a></li>
<li><a href="#trunkLayoutTestsfastcssstyleattributeinvalidationpropagatestoindirectsiblingshtml">trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-indirect-siblings.html</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (189835 => 189836)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog        2015-09-16 01:14:29 UTC (rev 189835)
+++ trunk/LayoutTests/ChangeLog        2015-09-16 01:31:50 UTC (rev 189836)
</span><span class="lines">@@ -1,3 +1,17 @@
</span><ins>+2015-09-15  Benjamin Poulain  &lt;bpoulain@apple.com&gt;
+
+        Style invalidation affecting siblings does not work with inline-style changes
+        https://bugs.webkit.org/show_bug.cgi?id=149189
+
+        Reviewed by Antti Koivisto.
+
+        * fast/css/style-attribute-invalidation-propagates-to-counted-siblings-expected.txt: Added.
+        * fast/css/style-attribute-invalidation-propagates-to-counted-siblings.html: Added.
+        * fast/css/style-attribute-invalidation-propagates-to-direct-siblings-expected.txt: Added.
+        * fast/css/style-attribute-invalidation-propagates-to-direct-siblings.html: Added.
+        * fast/css/style-attribute-invalidation-propagates-to-indirect-siblings-expected.txt: Added.
+        * fast/css/style-attribute-invalidation-propagates-to-indirect-siblings.html: Added.
+
</ins><span class="cx"> 2015-09-15  Myles C. Maxfield  &lt;mmaxfield@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Nested isolates can cause an infinite loop when laying out bidi runs
</span></span></pre></div>
<a id="trunkLayoutTestsfastcssstyleattributeinvalidationpropagatestocountedsiblingsexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-counted-siblings-expected.txt (0 => 189836)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-counted-siblings-expected.txt                                (rev 0)
+++ trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-counted-siblings-expected.txt        2015-09-16 01:31:50 UTC (rev 189836)
</span><span class="lines">@@ -0,0 +1,19 @@
</span><ins>+Test that style invalidation through inline-style propagates correctly to siblings when a combinator requires it.
+
+On success, you will see a series of &quot;PASS&quot; messages, followed by &quot;TEST COMPLETE&quot;.
+
+
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[0]).color is &quot;rgb(0, 0, 0)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[1]).color is &quot;rgb(0, 0, 0)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[0]).color is &quot;rgb(255, 192, 203)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[1]).color is &quot;rgb(255, 192, 203)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[0]).color is &quot;rgb(0, 0, 0)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[1]).color is &quot;rgb(0, 0, 0)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[0]).color is &quot;rgb(255, 192, 203)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[1]).color is &quot;rgb(255, 192, 203)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[0]).color is &quot;rgb(255, 192, 203)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[1]).color is &quot;rgb(255, 192, 203)&quot;
+PASS successfullyParsed is true
+
+TEST COMPLETE
+
</ins></span></pre></div>
<a id="trunkLayoutTestsfastcssstyleattributeinvalidationpropagatestocountedsiblingshtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-counted-siblings.html (0 => 189836)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-counted-siblings.html                                (rev 0)
+++ trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-counted-siblings.html        2015-09-16 01:31:50 UTC (rev 189836)
</span><span class="lines">@@ -0,0 +1,91 @@
</span><ins>+&lt;!DOCTYPE html&gt;
+&lt;html&gt;
+&lt;head&gt;
+&lt;script src=&quot;../../resources/js-test-pre.js&quot;&gt;&lt;/script&gt;
+&lt;style&gt;
+target {
+    color: black;
+}
+target:nth-child(2 of target, trigger[style]) {
+    color: pink;
+}
+&lt;/style&gt;
+&lt;/head&gt;
+&lt;body&gt;
+    &lt;div&gt;
+        &lt;!-- With renderer --&gt;
+        &lt;trigger&gt;&lt;/trigger&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;target&gt;&lt;/target&gt;
+    &lt;/div&gt;
+    &lt;div style=&quot;display:none;&quot;&gt;
+        &lt;!-- Without renderer --&gt;
+        &lt;trigger&gt;&lt;/trigger&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;target&gt;&lt;/target&gt;
+    &lt;/div&gt;
+&lt;/body&gt;
+&lt;script&gt;
+
+description('Test that style invalidation through inline-style propagates correctly to siblings when a combinator requires it.');
+
+function testTargetColor(expectedColor) {
+    let allTargets = document.querySelectorAll(&quot;target&quot;);
+    for (let i = 0; i &lt; allTargets.length; ++i) {
+        shouldBeEqualToString('getComputedStyle(document.querySelectorAll(&quot;target&quot;)[' + i + ']).color', expectedColor);
+    }
+}
+
+testTargetColor('rgb(0, 0, 0)');
+
+// Set a style through CSS OM.
+function setPropertyWithCSSOM() {
+    let allTriggers = document.querySelectorAll(&quot;trigger&quot;);
+    for (let i = 0; i &lt; allTriggers.length; ++i) {
+        allTriggers[i].style.cursor = &quot;auto&quot;;
+    }
+}
+setPropertyWithCSSOM()
+testTargetColor('rgb(255, 192, 203)');
+
+// If we remove the attribute, we should be back to normal.
+function removeStyleAttribute() {
+    let allTriggers = document.querySelectorAll(&quot;trigger&quot;);
+    for (let i = 0; i &lt; allTriggers.length; ++i) {
+        allTriggers[i].removeAttribute(&quot;style&quot;);
+    }
+}
+removeStyleAttribute();
+testTargetColor('rgb(0, 0, 0)');
+
+// Setting the style through a style attribute directly.
+function setStyleAttribute() {
+    let allTriggers = document.querySelectorAll(&quot;trigger&quot;);
+    for (let i = 0; i &lt; allTriggers.length; ++i) {
+        allTriggers[i].setAttribute(&quot;style&quot;, &quot;alt: \&quot;WebKit!\&quot;&quot;);
+    }
+}
+setStyleAttribute();
+testTargetColor('rgb(255, 192, 203)');
+
+// Removing the property on the style attribute through CSSOM.
+// This leaves an empty style attribute.
+function removePropertyWithCSSOM() {
+    let allTriggers = document.querySelectorAll(&quot;trigger&quot;);
+    for (let i = 0; i &lt; allTriggers.length; ++i) {
+        allTriggers[i].style.removeProperty(&quot;alt&quot;);
+    }
+}
+removePropertyWithCSSOM()
+testTargetColor('rgb(255, 192, 203)');
+&lt;/script&gt;
+&lt;script src=&quot;../../resources/js-test-post.js&quot;&gt;&lt;/script&gt;
+&lt;/html&gt;
</ins></span></pre></div>
<a id="trunkLayoutTestsfastcssstyleattributeinvalidationpropagatestodirectsiblingsexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-direct-siblings-expected.txt (0 => 189836)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-direct-siblings-expected.txt                                (rev 0)
+++ trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-direct-siblings-expected.txt        2015-09-16 01:31:50 UTC (rev 189836)
</span><span class="lines">@@ -0,0 +1,19 @@
</span><ins>+Test that style invalidation through inline-style propagates correctly to siblings when a combinator requires it.
+
+On success, you will see a series of &quot;PASS&quot; messages, followed by &quot;TEST COMPLETE&quot;.
+
+
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[0]).color is &quot;rgb(0, 0, 0)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[1]).color is &quot;rgb(0, 0, 0)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[0]).color is &quot;rgb(255, 192, 203)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[1]).color is &quot;rgb(255, 192, 203)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[0]).color is &quot;rgb(0, 0, 0)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[1]).color is &quot;rgb(0, 0, 0)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[0]).color is &quot;rgb(255, 192, 203)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[1]).color is &quot;rgb(255, 192, 203)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[0]).color is &quot;rgb(255, 192, 203)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[1]).color is &quot;rgb(255, 192, 203)&quot;
+PASS successfullyParsed is true
+
+TEST COMPLETE
+
</ins></span></pre></div>
<a id="trunkLayoutTestsfastcssstyleattributeinvalidationpropagatestodirectsiblingshtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-direct-siblings.html (0 => 189836)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-direct-siblings.html                                (rev 0)
+++ trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-direct-siblings.html        2015-09-16 01:31:50 UTC (rev 189836)
</span><span class="lines">@@ -0,0 +1,81 @@
</span><ins>+&lt;!DOCTYPE html&gt;
+&lt;html&gt;
+&lt;head&gt;
+&lt;script src=&quot;../../resources/js-test-pre.js&quot;&gt;&lt;/script&gt;
+&lt;style&gt;
+target {
+    color: black;
+}
+trigger[style] + target {
+    color: pink;
+}
+&lt;/style&gt;
+&lt;/head&gt;
+&lt;body&gt;
+    &lt;div&gt;
+        &lt;!-- With renderer --&gt;
+        &lt;trigger&gt;&lt;/trigger&gt;
+        &lt;target&gt;&lt;/target&gt;
+    &lt;/div&gt;
+    &lt;div style=&quot;display:none;&quot;&gt;
+        &lt;!-- Without renderer --&gt;
+        &lt;trigger&gt;&lt;/trigger&gt;
+        &lt;target&gt;&lt;/target&gt;
+    &lt;/div&gt;
+&lt;/body&gt;
+&lt;script&gt;
+
+description('Test that style invalidation through inline-style propagates correctly to siblings when a combinator requires it.');
+
+function testTargetColor(expectedColor) {
+    let allTargets = document.querySelectorAll(&quot;target&quot;);
+    for (let i = 0; i &lt; allTargets.length; ++i) {
+        shouldBeEqualToString('getComputedStyle(document.querySelectorAll(&quot;target&quot;)[' + i + ']).color', expectedColor);
+    }
+}
+
+testTargetColor('rgb(0, 0, 0)');
+
+// Set a style through CSS OM.
+function setPropertyWithCSSOM() {
+    let allTriggers = document.querySelectorAll(&quot;trigger&quot;);
+    for (let i = 0; i &lt; allTriggers.length; ++i) {
+        allTriggers[i].style.cursor = &quot;auto&quot;;
+    }
+}
+setPropertyWithCSSOM()
+testTargetColor('rgb(255, 192, 203)');
+
+// If we remove the attribute, we should be back to normal.
+function removeStyleAttribute() {
+    let allTriggers = document.querySelectorAll(&quot;trigger&quot;);
+    for (let i = 0; i &lt; allTriggers.length; ++i) {
+        allTriggers[i].removeAttribute(&quot;style&quot;);
+    }
+}
+removeStyleAttribute();
+testTargetColor('rgb(0, 0, 0)');
+
+// Setting the style through a style attribute directly.
+function setStyleAttribute() {
+    let allTriggers = document.querySelectorAll(&quot;trigger&quot;);
+    for (let i = 0; i &lt; allTriggers.length; ++i) {
+        allTriggers[i].setAttribute(&quot;style&quot;, &quot;alt: \&quot;WebKit!\&quot;&quot;);
+    }
+}
+setStyleAttribute();
+testTargetColor('rgb(255, 192, 203)');
+
+// Removing the property on the style attribute through CSSOM.
+// This leaves an empty style attribute.
+function removePropertyWithCSSOM() {
+    let allTriggers = document.querySelectorAll(&quot;trigger&quot;);
+    for (let i = 0; i &lt; allTriggers.length; ++i) {
+        allTriggers[i].style.removeProperty(&quot;alt&quot;);
+    }
+}
+removePropertyWithCSSOM()
+testTargetColor('rgb(255, 192, 203)');
+&lt;/script&gt;
+&lt;script src=&quot;../../resources/js-test-post.js&quot;&gt;&lt;/script&gt;
+&lt;/html&gt;
</ins></span></pre></div>
<a id="trunkLayoutTestsfastcssstyleattributeinvalidationpropagatestoindirectsiblingsexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-indirect-siblings-expected.txt (0 => 189836)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-indirect-siblings-expected.txt                                (rev 0)
+++ trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-indirect-siblings-expected.txt        2015-09-16 01:31:50 UTC (rev 189836)
</span><span class="lines">@@ -0,0 +1,19 @@
</span><ins>+Test that style invalidation through inline-style propagates correctly to siblings when a combinator requires it.
+
+On success, you will see a series of &quot;PASS&quot; messages, followed by &quot;TEST COMPLETE&quot;.
+
+
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[0]).color is &quot;rgb(0, 0, 0)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[1]).color is &quot;rgb(0, 0, 0)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[0]).color is &quot;rgb(255, 192, 203)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[1]).color is &quot;rgb(255, 192, 203)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[0]).color is &quot;rgb(0, 0, 0)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[1]).color is &quot;rgb(0, 0, 0)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[0]).color is &quot;rgb(255, 192, 203)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[1]).color is &quot;rgb(255, 192, 203)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[0]).color is &quot;rgb(255, 192, 203)&quot;
+PASS getComputedStyle(document.querySelectorAll(&quot;target&quot;)[1]).color is &quot;rgb(255, 192, 203)&quot;
+PASS successfullyParsed is true
+
+TEST COMPLETE
+
</ins></span></pre></div>
<a id="trunkLayoutTestsfastcssstyleattributeinvalidationpropagatestoindirectsiblingshtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-indirect-siblings.html (0 => 189836)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-indirect-siblings.html                                (rev 0)
+++ trunk/LayoutTests/fast/css/style-attribute-invalidation-propagates-to-indirect-siblings.html        2015-09-16 01:31:50 UTC (rev 189836)
</span><span class="lines">@@ -0,0 +1,91 @@
</span><ins>+&lt;!DOCTYPE html&gt;
+&lt;html&gt;
+&lt;head&gt;
+&lt;script src=&quot;../../resources/js-test-pre.js&quot;&gt;&lt;/script&gt;
+&lt;style&gt;
+target {
+    color: black;
+}
+trigger[style] ~ target {
+    color: pink;
+}
+&lt;/style&gt;
+&lt;/head&gt;
+&lt;body&gt;
+    &lt;div&gt;
+        &lt;!-- With renderer --&gt;
+        &lt;trigger&gt;&lt;/trigger&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;target&gt;&lt;/target&gt;
+    &lt;/div&gt;
+    &lt;div style=&quot;display:none;&quot;&gt;
+        &lt;!-- Without renderer --&gt;
+        &lt;trigger&gt;&lt;/trigger&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;padding&gt;&lt;/padding&gt;
+        &lt;target&gt;&lt;/target&gt;
+    &lt;/div&gt;
+&lt;/body&gt;
+&lt;script&gt;
+
+description('Test that style invalidation through inline-style propagates correctly to siblings when a combinator requires it.');
+
+function testTargetColor(expectedColor) {
+    let allTargets = document.querySelectorAll(&quot;target&quot;);
+    for (let i = 0; i &lt; allTargets.length; ++i) {
+        shouldBeEqualToString('getComputedStyle(document.querySelectorAll(&quot;target&quot;)[' + i + ']).color', expectedColor);
+    }
+}
+
+testTargetColor('rgb(0, 0, 0)');
+
+// Set a style through CSS OM.
+function setPropertyWithCSSOM() {
+    let allTriggers = document.querySelectorAll(&quot;trigger&quot;);
+    for (let i = 0; i &lt; allTriggers.length; ++i) {
+        allTriggers[i].style.cursor = &quot;auto&quot;;
+    }
+}
+setPropertyWithCSSOM()
+testTargetColor('rgb(255, 192, 203)');
+
+// If we remove the attribute, we should be back to normal.
+function removeStyleAttribute() {
+    let allTriggers = document.querySelectorAll(&quot;trigger&quot;);
+    for (let i = 0; i &lt; allTriggers.length; ++i) {
+        allTriggers[i].removeAttribute(&quot;style&quot;);
+    }
+}
+removeStyleAttribute();
+testTargetColor('rgb(0, 0, 0)');
+
+// Setting the style through a style attribute directly.
+function setStyleAttribute() {
+    let allTriggers = document.querySelectorAll(&quot;trigger&quot;);
+    for (let i = 0; i &lt; allTriggers.length; ++i) {
+        allTriggers[i].setAttribute(&quot;style&quot;, &quot;alt: \&quot;WebKit!\&quot;&quot;);
+    }
+}
+setStyleAttribute();
+testTargetColor('rgb(255, 192, 203)');
+
+// Removing the property on the style attribute through CSSOM.
+// This leaves an empty style attribute.
+function removePropertyWithCSSOM() {
+    let allTriggers = document.querySelectorAll(&quot;trigger&quot;);
+    for (let i = 0; i &lt; allTriggers.length; ++i) {
+        allTriggers[i].style.removeProperty(&quot;alt&quot;);
+    }
+}
+removePropertyWithCSSOM()
+testTargetColor('rgb(255, 192, 203)');
+&lt;/script&gt;
+&lt;script src=&quot;../../resources/js-test-post.js&quot;&gt;&lt;/script&gt;
+&lt;/html&gt;
</ins></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (189835 => 189836)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog        2015-09-16 01:14:29 UTC (rev 189835)
+++ trunk/Source/WebCore/ChangeLog        2015-09-16 01:31:50 UTC (rev 189836)
</span><span class="lines">@@ -1,3 +1,33 @@
</span><ins>+2015-09-15  Benjamin Poulain  &lt;bpoulain@apple.com&gt;
+
+        Style invalidation affecting siblings does not work with inline-style changes
+        https://bugs.webkit.org/show_bug.cgi?id=149189
+
+        Reviewed by Antti Koivisto.
+
+        Style::resolveTree() made the assumption that inline style changes only affect
+        descendants and should not participate in &quot;StyleRecalcAffectsNextSiblingElementStyle&quot;.
+        That was wrong. If the inline style change through CSSOM, it can cause the creation
+        of a style attribute, which is observable through &quot;StyleRecalcAffectsNextSiblingElementStyle&quot;.
+
+        This patch removes the incorrect assumption. Style invalidation is always propagated now.
+
+        Tests: fast/css/style-attribute-invalidation-propagates-to-counted-siblings.html
+               fast/css/style-attribute-invalidation-propagates-to-direct-siblings.html
+               fast/css/style-attribute-invalidation-propagates-to-indirect-siblings.html
+
+        * css/PropertySetCSSStyleDeclaration.cpp:
+        (WebCore::InlineCSSStyleDeclaration::didMutate): Deleted.
+        * dom/StyledElement.cpp:
+        (WebCore::StyledElement::inlineStyleChanged):
+        * dom/StyledElement.h:
+        (WebCore::StyledElement::invalidateStyleAttribute):
+        Clean up inline-style invalidation a tiny bit.
+
+        * style/StyleResolveTree.cpp:
+        (WebCore::Style::resolveTree):
+        Fix the bug.
+
</ins><span class="cx"> 2015-09-15  Joseph Pecoraro  &lt;pecoraro@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Web Inspector: Paused Debugger prevents page reload
</span></span></pre></div>
<a id="trunkSourceWebCorecssPropertySetCSSStyleDeclarationcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/css/PropertySetCSSStyleDeclaration.cpp (189835 => 189836)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/css/PropertySetCSSStyleDeclaration.cpp        2015-09-16 01:14:29 UTC (rev 189835)
+++ trunk/Source/WebCore/css/PropertySetCSSStyleDeclaration.cpp        2015-09-16 01:31:50 UTC (rev 189836)
</span><span class="lines">@@ -365,7 +365,6 @@
</span><span class="cx">     if (!m_parentElement)
</span><span class="cx">         return;
</span><span class="cx"> 
</span><del>-    m_parentElement-&gt;setNeedsStyleRecalc(InlineStyleChange);
</del><span class="cx">     m_parentElement-&gt;invalidateStyleAttribute();
</span><span class="cx">     StyleAttributeMutationScope(this).didInvalidateStyleAttr();
</span><span class="cx"> }
</span></span></pre></div>
<a id="trunkSourceWebCoredomStyledElementcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/dom/StyledElement.cpp (189835 => 189836)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/dom/StyledElement.cpp        2015-09-16 01:14:29 UTC (rev 189835)
+++ trunk/Source/WebCore/dom/StyledElement.cpp        2015-09-16 01:31:50 UTC (rev 189836)
</span><span class="lines">@@ -214,9 +214,7 @@
</span><span class="cx"> 
</span><span class="cx"> void StyledElement::inlineStyleChanged()
</span><span class="cx"> {
</span><del>-    setNeedsStyleRecalc(InlineStyleChange);
-    ASSERT(elementData());
-    elementData()-&gt;setStyleAttributeIsDirty(true);
</del><ins>+    invalidateStyleAttribute();
</ins><span class="cx">     InspectorInstrumentation::didInvalidateStyleAttr(document(), *this);
</span><span class="cx"> }
</span><span class="cx">     
</span></span></pre></div>
<a id="trunkSourceWebCoredomStyledElementh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/dom/StyledElement.h (189835 => 189836)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/dom/StyledElement.h        2015-09-16 01:14:29 UTC (rev 189835)
+++ trunk/Source/WebCore/dom/StyledElement.h        2015-09-16 01:31:50 UTC (rev 189836)
</span><span class="lines">@@ -97,6 +97,7 @@
</span><span class="cx"> {
</span><span class="cx">     ASSERT(elementData());
</span><span class="cx">     elementData()-&gt;setStyleAttributeIsDirty(true);
</span><ins>+    setNeedsStyleRecalc(InlineStyleChange);
</ins><span class="cx"> }
</span><span class="cx"> 
</span><span class="cx"> inline const StyleProperties* StyledElement::presentationAttributeStyle()
</span></span></pre></div>
<a id="trunkSourceWebCorestyleStyleResolveTreecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/style/StyleResolveTree.cpp (189835 => 189836)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/style/StyleResolveTree.cpp        2015-09-16 01:14:29 UTC (rev 189835)
+++ trunk/Source/WebCore/style/StyleResolveTree.cpp        2015-09-16 01:31:50 UTC (rev 189836)
</span><span class="lines">@@ -820,7 +820,7 @@
</span><span class="cx">                 if (childElement.styleIsAffectedByPreviousSibling())
</span><span class="cx">                     childElement.setNeedsStyleRecalc();
</span><span class="cx">                 elementNeedingStyleRecalcAffectsNextSiblingElementStyle = childElement.affectsNextSiblingElementStyle();
</span><del>-            } else if (childElement.styleChangeType() &gt;= FullStyleChange)
</del><ins>+            } else if (childElement.needsStyleRecalc())
</ins><span class="cx">                 elementNeedingStyleRecalcAffectsNextSiblingElementStyle = childElement.affectsNextSiblingElementStyle();
</span><span class="cx">             if (change &gt;= Inherit || childElement.childNeedsStyleRecalc() || childElement.needsStyleRecalc()) {
</span><span class="cx">                 parentPusher.push();
</span></span></pre>
</div>
</div>

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