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

chrome/browser/ui/views/frame/browser_view.h

Index: chrome/browser/ui/views/frame/browser_view.h
diff --git a/chrome/browser/ui/views/frame/browser_view.h b/chrome/browser/ui/views/frame/browser_view.h
index e3feb6cf8e2b62bbd1d38167374740fc129de31a..47ec8f708377edb4e33825e2561c2587bee38d7f 100644
--- a/chrome/browser/ui/views/frame/browser_view.h
+++ b/chrome/browser/ui/views/frame/browser_view.h
@@ -251,10 +251,7 @@ class BrowserView : public BrowserWindow,
   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 zoom_icon_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 gfx::Rect GetRestoredBounds() const OVERRIDE;
   virtual gfx::Rect GetBounds() const OVERRIDE;
   virtual bool IsMaximized() const OVERRIDE;