Make pseudo-classes selector queries work on DocumentFragment

Source/core/css/resolver/SharedStyleFinder.cpp

Index: Source/core/css/resolver/SharedStyleFinder.cpp
diff --git a/Source/core/css/resolver/SharedStyleFinder.cpp b/Source/core/css/resolver/SharedStyleFinder.cpp
index b7b25217eb4a89a84f707b85dc3bf9db632e17c1..116852dc4ad46263543c8f57affc4103f7aef0ed 100644
--- a/Source/core/css/resolver/SharedStyleFinder.cpp
+++ b/Source/core/css/resolver/SharedStyleFinder.cpp
@@ -337,7 +337,7 @@ RenderStyle* SharedStyleFinder::findSharedStyle()
     }
 
     // Tracking child index requires unique style for each node. This may get set by the sibling rule match above.
-    if (!element().parentElementOrShadowRoot()->childrenSupportStyleSharing()) {
+    if (!element().parentElementOrDocumentFragment()->childrenSupportStyleSharing()) {

[esprehn, 2014/05/08 05:25:11]

This also doesn't make sense, we can't style share in a DocumentFragment. It's
never attached.

[Inactive, 2014/05/08 13:17:36]

Done.

         INCREMENT_STYLE_STATS_COUNTER(m_styleResolver, sharedStyleRejectedByParent);
         return 0;
     }