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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - iOS WebKit doesn't build."
   href="https://bugs.webkit.org/show_bug.cgi?id=146917#c5">Comment # 5</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - iOS WebKit doesn't build."
   href="https://bugs.webkit.org/show_bug.cgi?id=146917">bug 146917</a>
              from <span class="vcard"><a class="email" href="mailto:yongjun_zhang&#64;apple.com" title="Yongjun Zhang &lt;yongjun_zhang&#64;apple.com&gt;"> <span class="fn">Yongjun Zhang</span></a>
</span></b>
        <pre>(In reply to <a href="show_bug.cgi?id=146917#c3">comment #3</a>)
<span class="quote">&gt; Comment on <span class=""><a href="attachment.cgi?id=256730&amp;action=diff" name="attach_256730" title="Patch.">attachment 256730</a> <a href="attachment.cgi?id=256730&amp;action=edit" title="Patch.">[details]</a></span>
&gt; Patch.
&gt; 
&gt; View in context:
&gt; <a href="https://bugs.webkit.org/attachment.cgi?id=256730&amp;action=review">https://bugs.webkit.org/attachment.cgi?id=256730&amp;action=review</a>
&gt; 
&gt; &gt; Source/WebKit2/UIProcess/ios/WKContentViewInteraction.mm:3185
&gt; &gt; +    _previewing = [window.rootViewController registerForPreviewingWithSourceView:self];
&gt; 
&gt; Do we need to retain this?</span >

yeah, I think we need to. Will Change.</pre>
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