Oilpan: Move CSSStyleDeclaration and subclasses to the heap using transistion types.

Source/core/editing/ApplyStyleCommand.cpp

Index: Source/core/editing/ApplyStyleCommand.cpp
diff --git a/Source/core/editing/ApplyStyleCommand.cpp b/Source/core/editing/ApplyStyleCommand.cpp
index 553e54c4a1958287400dc1b33958edb53fd7c75c..7686eb719af48f9f9ac04e3895137812b51f0aaa 100644
--- a/Source/core/editing/ApplyStyleCommand.cpp
+++ b/Source/core/editing/ApplyStyleCommand.cpp
@@ -1501,7 +1501,7 @@ float ApplyStyleCommand::computedFontSize(Node* node)
     if (!node)
         return 0;
 
-    RefPtr<CSSComputedStyleDeclaration> style = CSSComputedStyleDeclaration::create(node);
+    RefPtrWillBeRawPtr<CSSComputedStyleDeclaration> style = CSSComputedStyleDeclaration::create(node);
     if (!style)
         return 0;