Add operator== to CSSTransitionData.

third_party/WebKit/Source/core/style/StyleRareNonInheritedData.cpp

Index: third_party/WebKit/Source/core/style/StyleRareNonInheritedData.cpp
diff --git a/third_party/WebKit/Source/core/style/StyleRareNonInheritedData.cpp b/third_party/WebKit/Source/core/style/StyleRareNonInheritedData.cpp
index 44a79a57c60ffe96815df42847d9251ab8a849a4..0e3c555919e4f6b44501bcb70cb271f3cc99888a 100644
--- a/third_party/WebKit/Source/core/style/StyleRareNonInheritedData.cpp
+++ b/third_party/WebKit/Source/core/style/StyleRareNonInheritedData.cpp
@@ -316,11 +316,7 @@ bool StyleRareNonInheritedData::AnimationDataEquivalent(
 
 bool StyleRareNonInheritedData::TransitionDataEquivalent(
     const StyleRareNonInheritedData& o) const {
-  if (!transitions_ && !o.transitions_)
-    return true;
-  if (!transitions_ || !o.transitions_)
-    return false;
-  return transitions_->TransitionsMatchForStyleRecalc(*o.transitions_);
+  return DataEquivalent(transitions_, o.transitions_);
 }
 
 bool StyleRareNonInheritedData::ShapeOutsideDataEquivalent(