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

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #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"
 #include "core/frame/DOMWindowBase64.h"
 #include "core/frame/Frame.h"
 #include "platform/heap/Handle.h"
 #include "platform/wtf/Assertions.h"
 #include "platform/wtf/Forward.h"
 
 namespace blink {
@@ skipping 26 matching lines @@
     //   issues where executing script incorrectly schedules work on a detached
     //   frame.
     SECURITY_DCHECK(!frame_ ||
                     (frame_->DomWindow() == this && frame_->GetPage()));
     return frame_;
   }
 
   // GarbageCollectedFinalized overrides:
   DECLARE_VIRTUAL_TRACE();
 
+  DECLARE_VIRTUAL_TRACE_WRAPPERS();
+
   virtual bool IsLocalDOMWindow() const = 0;
   virtual bool IsRemoteDOMWindow() const = 0;
 
   // ScriptWrappable overrides:
   v8::Local<v8::Object> Wrap(v8::Isolate*,
                              v8::Local<v8::Object> creation_context) final;
   v8::Local<v8::Object> AssociateWithWrapper(
       v8::Isolate*,
       const WrapperTypeInfo*,
       v8::Local<v8::Object> wrapper) final;
@@ skipping 56 matching lines @@
 
   void DisconnectFromFrame() { frame_ = nullptr; }
 
  private:
   Member<Frame> frame_;
   // Unlike |frame_|, |window_proxy_manager_| is available even after the
   // window's frame gets detached from the DOM, until the end of the lifetime
   // 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'
   // only after the layout widget's deferred window close
   // operation has been performed, exposes (confusing)
   // implementation details to scripts.
   bool window_is_closing_;
 };
 
 }  // namespace blink
 
 #endif  // DOMWindow_h