[Webkit-unassigned] [Bug 52414] New: [Chromium] Disabled scrollbars are not rendered in the same way as the Mac port

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=52414

           Summary: [Chromium] Disabled scrollbars are not rendered in the
                    same way as the Mac port
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mihaip at chromium.org
                CC: dglazkov at chromium.org


The following tests fail with pixel diffs:

fast/body-propagation/overflow/001-xhtml.xhtml
fast/body-propagation/overflow/001.html
fast/body-propagation/overflow/005-declarative.xhtml
fast/body-propagation/overflow/005-xhtml.xhtml
fast/body-propagation/overflow/005.html
fast/overflow/006.html
fast/overflow/overflow-x-y.html

They all have at least one scrollbar that's disabled (it's displayed and in the foreground, but there's nothing to scroll). It appears that this is another difference between HITheme and NSScroller-based rendering. The WebThemeEngine mechanism introduced by http://trac.webkit.org/changeset/74581, http://crrev.com/70278 and http://trac.webkit.org/changeset/74821 could in theory be extended to scrollbar tracks to allow them to be rendered in a consistent manner by WebThemeEngineDRTMac, but it may not be worth it for 6 tests.

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