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

chrome/browser/ui/panels/panel_browser_window.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_PANELS_PANEL_BROWSER_WINDOW_H_
 #define CHROME_BROWSER_UI_PANELS_PANEL_BROWSER_WINDOW_H_
 
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
 
@@ skipping 41 matching lines @@
   virtual gfx::NativeWindow GetNativeWindow() OVERRIDE;
   virtual BrowserWindowTesting* GetBrowserWindowTesting() OVERRIDE;
   virtual StatusBubble* GetStatusBubble() OVERRIDE;
   virtual void UpdateTitleBar() OVERRIDE;
   virtual void BookmarkBarStateChanged(
       BookmarkBar::AnimateChangeType change_type) OVERRIDE;
   virtual void UpdateDevTools() OVERRIDE;
   virtual void SetDevToolsDockSide(DevToolsDockSide side) OVERRIDE;
   virtual void UpdateLoadingAnimations(bool should_animate) OVERRIDE;
   virtual void SetStarredState(bool is_starred) OVERRIDE;
-  virtual void SetZoomIconState(ZoomController::ZoomIconState state) OVERRIDE;
-  virtual void SetZoomIconTooltipPercent(int zoom_percent) OVERRIDE;
-  virtual void ShowZoomBubble(int zoom_percent) OVERRIDE;
+  virtual void ZoomChangedForActiveTab(bool can_show_bubble) OVERRIDE;
   virtual void EnterFullscreen(
       const GURL& url, FullscreenExitBubbleType type) OVERRIDE;
   virtual void ExitFullscreen() OVERRIDE;
 #if defined(OS_WIN)
   virtual void SetMetroSnapMode(bool enable) OVERRIDE;
   virtual bool IsInMetroSnapMode() const OVERRIDE;
 #endif
   virtual void UpdateFullscreenExitBubbleContent(
       const GURL& url,
       FullscreenExitBubbleType bubble_type) OVERRIDE;
@@ skipping 92 matching lines @@
   Panel* panel_;  // Weak pointer. Owns us.
 
   // Platform specifc implementation for panels.  It'd be one of
   // PanelBrowserWindowGtk/PanelBrowserView/PanelBrowserWindowCocoa.
   NativePanel* native_panel_;  // Weak, owns us (through ownership of Panel).
 
   DISALLOW_COPY_AND_ASSIGN(PanelBrowserWindow);
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_PANEL_BROWSER_WINDOW_H_