Make pseudo element update work with LocalStyleChange.

Source/core/rendering/style/RenderStyle.h

Index: Source/core/rendering/style/RenderStyle.h
diff --git a/Source/core/rendering/style/RenderStyle.h b/Source/core/rendering/style/RenderStyle.h
index a8fbae49e3b1169570b43afa4fda82d059a119c7..c82bc7cd69ab5bc2cfde7702fb82a14eea560783 100644
--- a/Source/core/rendering/style/RenderStyle.h
+++ b/Source/core/rendering/style/RenderStyle.h
@@ -437,6 +437,7 @@ public:
     bool hasPseudoStyle(PseudoId pseudo) const;
     void setHasPseudoStyle(PseudoId pseudo);
     bool hasUniquePseudoStyle() const;
+    bool hasPseudoElementStyle() const;
 
     // attribute getter methods
 
@@ -1890,6 +1891,11 @@ inline void RenderStyle::setHasPseudoStyle(PseudoId pseudo)
     noninherited_flags._pseudoBits |= 1 << (pseudo - 1);
 }
 
+inline bool RenderStyle::hasPseudoElementStyle() const
+{
+    return noninherited_flags._pseudoBits & PSEUDO_ELEMENT_MASK;
+}
+
 } // namespace WebCore
 
 #endif // RenderStyle_h