[gtk] fix zoom bubble showing up on wrong window

chrome/browser/ui/zoom/zoom_controller.h

 // Copyright (c) 2012 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_UI_ZOOM_ZOOM_CONTROLLER_H_
 #define CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "chrome/browser/api/prefs/pref_member.h"
@@ skipping 34 matching lines @@
   virtual void DidNavigateMainFrame(
       const content::LoadCommittedDetails& details,
       const content::FrameNavigateParams& params) OVERRIDE;
 
   // content::NotificationObserver overrides:
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // Updates the zoom icon and zoom percentage based on current values and
-  // notifies the observer if changes have occurred. |can_show_bubble| will be
-  // true only if the active window changes the zoom on the current page (i.e.,
-  // inactive window zoom changes, creating a new tab/window, or shifting
-  // between tabs/windows, although they may involve a change in the zoom,
-  // should not trigger showing a bubble).
-  void UpdateState(bool can_show_bubble);
+  // notifies the observer if changes have occurred. |host| may be empty,
+  // meaning the change should apply to ~all sites. If it is not empty, the
+  // change only affects sites with the given host.
+  void UpdateState(const std::string& host);
 
   // The current zoom percentage.
   int zoom_percent_;
 
   content::NotificationRegistrar registrar_;
 
   // Used to access the default zoom level preference.
   DoublePrefMember default_zoom_level_;
 
   // Observer receiving notifications on state changes.
   ZoomObserver* observer_;
 
   DISALLOW_COPY_AND_ASSIGN(ZoomController);
 };
 
 #endif  // CHROME_BROWSER_UI_ZOOM_ZOOM_CONTROLLER_H_