v8binding: Makes Location's wrapper objects alive, really.

third_party/WebKit/Source/core/frame/DOMWindow.h

Index: third_party/WebKit/Source/core/frame/DOMWindow.h
diff --git a/third_party/WebKit/Source/core/frame/DOMWindow.h b/third_party/WebKit/Source/core/frame/DOMWindow.h
index 54bda6350a8a1eecef7c9324783029593e519fc0..be224d432d94bb52daf5a8b26cec359df0cde25c 100644
--- a/third_party/WebKit/Source/core/frame/DOMWindow.h
+++ b/third_party/WebKit/Source/core/frame/DOMWindow.h
@@ -5,6 +5,7 @@
 #ifndef DOMWindow_h
 #define DOMWindow_h
 
+#include "bindings/core/v8/TraceWrapperMember.h"
 #include "bindings/core/v8/Transferables.h"
 #include "core/CoreExport.h"
 #include "core/events/EventTarget.h"
@@ -51,6 +52,8 @@ class CORE_EXPORT DOMWindow : public EventTargetWithInlineData,
   // GarbageCollectedFinalized overrides:
   DECLARE_VIRTUAL_TRACE();
 
+  DECLARE_VIRTUAL_TRACE_WRAPPERS();
+
   virtual bool IsLocalDOMWindow() const = 0;
   virtual bool IsRemoteDOMWindow() const = 0;
 
@@ -127,7 +130,7 @@ class CORE_EXPORT DOMWindow : public EventTargetWithInlineData,
   // of this object.
   const Member<WindowProxyManager> window_proxy_manager_;
   Member<InputDeviceCapabilitiesConstants> input_capabilities_;
-  mutable Member<Location> location_;
+  mutable TraceWrapperMember<Location> location_;
 
   // Set to true when close() has been called. Needed for
   // |window.closed| determinism; having it return 'true'