binding: Changes the association among global-proxy/global/window-instance.

third_party/WebKit/Source/bindings/core/v8/WrapperTypeInfo.h

Index: third_party/WebKit/Source/bindings/core/v8/WrapperTypeInfo.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/WrapperTypeInfo.h b/third_party/WebKit/Source/bindings/core/v8/WrapperTypeInfo.h
index ce9429af5f18e46aa00d47c8adf59acfb08be70a..a11882d8317d412a44148470a11604ce4e8bc4c5 100644
--- a/third_party/WebKit/Source/bindings/core/v8/WrapperTypeInfo.h
+++ b/third_party/WebKit/Source/bindings/core/v8/WrapperTypeInfo.h
@@ -135,11 +135,11 @@ struct WrapperTypeInfo {
     return domTemplateFunction(isolate, world);
   }
 
-  void wrapperCreated() const {
+  static void wrapperCreated() {
     ThreadState::current()->heap().heapStats().increaseWrapperCount(1);
   }
 
-  void wrapperDestroyed() const {
+  static void wrapperDestroyed() {
     ThreadHeapStats& heapStats = ThreadState::current()->heap().heapStats();
     heapStats.decreaseWrapperCount(1);
     heapStats.increaseCollectedWrapperCount(1);
@@ -206,6 +206,8 @@ inline T* getInternalField(v8::Local<v8::Object> wrapper) {
       wrapper->GetAlignedPointerFromInternalField(offset));
 }
 
+// The return value can be null if |wrapper| is a global proxy object, which
+// points to nothing while a navigation.
 inline ScriptWrappable* toScriptWrappable(
     const v8::PersistentBase<v8::Object>& wrapper) {
   return getInternalField<ScriptWrappable, v8DOMWrapperObjectIndex>(wrapper);