Refactor browser window zoom handling and enable zoom icon on all platforms.

chrome/browser/ui/gtk/location_bar_view_gtk.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_GTK_LOCATION_BAR_VIEW_GTK_H_
 #define CHROME_BROWSER_UI_GTK_LOCATION_BAR_VIEW_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 90 matching lines @@
 
   // Show the zoom bubble.
   void ShowZoomBubble(int zoom_percent);
 
   // Show the bookmark bubble.
   void ShowStarBubble(const GURL& url, bool newly_boomkarked);
 
   // Shows the Chrome To Mobile bubble.
   void ShowChromeToMobileBubble();
 
-  // Sets the tooltip for the zoom icon.
-  void SetZoomIconTooltipPercent(int zoom_percent);
-
-  // Sets the zoom icon state.
-  void SetZoomIconState(ZoomController::ZoomIconState zoom_icon_state);
+  void ZoomChangedForActiveTab(bool can_show_bubble);
 
   // Set the starred state of the bookmark star.
   void SetStarred(bool starred);
 
   // OmniboxEditController:
   virtual void OnAutocompleteAccept(const GURL& url,
                                     WindowOpenDisposition disposition,
                                     content::PageTransition transition,
                                     const GURL& alternate_nav_url) OVERRIDE;
   virtual void OnChanged() OVERRIDE;
@@ skipping 410 matching lines @@
   // The last search keyword that was shown via the |tab_to_search_box_|.
   string16 last_keyword_;
 
   // Used to change the visibility of the star decoration.
   BooleanPrefMember edit_bookmarks_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(LocationBarViewGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_LOCATION_BAR_VIEW_GTK_H_