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 91021cb46bf4d00f2433bd67c257eb0f3310e507..dfe374e8abd5b5f6ca5f46ba141e20e7ed778f84 100644
--- a/chrome/browser/ui/views/frame/browser_view.h
+++ b/chrome/browser/ui/views/frame/browser_view.h
@@ -248,10 +248,7 @@ 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;