Land http://codereview.chromium.org/159067:

chrome/browser/renderer_host/render_view_host.h

 // Copyright (c) 2009 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 CHROME_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 408 matching lines @@
   void CreateNewWidget(int route_id, bool activatable);
 
   // Senf the response to an extension api call.
   void SendExtensionResponse(int request_id, bool success,
                              const std::string& response,
                              const std::string& error);
 
   void SignalModalDialogEvent();
   void ResetModalDialogEvent();
 
+  // Tell renderer which browser window it is being attached to.
+  void UpdateBrowserWindowId(int window_id);
+
   void set_in_inspect_element_mode(bool enabled) {
     in_inspect_element_mode_ = enabled;
   }
 
  protected:
   // RenderWidgetHost protected overrides.
   virtual void UnhandledKeyboardEvent(const NativeWebKeyboardEvent& event);
   virtual void OnUserGesture();
   virtual void NotifyRendererUnresponsive();
   virtual void NotifyRendererResponsive();
@@ skipping 206 matching lines @@
   // While in this mode, mouse click is converted into InspectElement
   // command.
   bool in_inspect_element_mode_;
 
   NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewHost);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_H_