v8binding: Makes ToV8(window) work without a frame.

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/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 {
 
 class Document;
 class InputDeviceCapabilitiesConstants;
+class LocalDOMWindow;
 class Location;
-class LocalDOMWindow;
 class MessageEvent;
 class SerializedScriptValue;
+class WindowProxyManager;
 
 class CORE_EXPORT DOMWindow : public EventTargetWithInlineData,
                               public DOMWindowBase64 {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   ~DOMWindow() override;
 
   Frame* GetFrame() const {
     // A Frame is typically reused for navigations. If |m_frame| is not null,
@@ skipping 66 matching lines @@
 
   // FIXME: When this DOMWindow is no longer the active DOMWindow (i.e.,
   // when its document is no longer the document that is displayed in its
   // frame), we would like to zero out m_frame to avoid being confused
   // by the document that is currently active in m_frame.
   // See https://bugs.webkit.org/show_bug.cgi?id=62054
   bool IsCurrentlyDisplayedInFrame() const;
 
   bool isSecureContext() const;
 
+  v8::Local<v8::Object> GlobalProxy(DOMWrapperWorld&);
+
   InputDeviceCapabilitiesConstants* GetInputDeviceCapabilities();
 
  protected:
   explicit DOMWindow(Frame&);
 
   virtual void SchedulePostMessage(MessageEvent*,
                                    PassRefPtr<SecurityOrigin> target,
                                    Document* source) = 0;
 
   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_;
 
   // 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