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

chrome/test/base/test_browser_window.h

Index: chrome/test/base/test_browser_window.h
diff --git a/chrome/test/base/test_browser_window.h b/chrome/test/base/test_browser_window.h
index 2317779a652c3c0766e31e64a66b6ea849d68b17..7f8e078a84334113ecdb871e899059ad26d3491d 100644
--- a/chrome/test/base/test_browser_window.h
+++ b/chrome/test/base/test_browser_window.h
@@ -44,9 +44,7 @@ class TestBrowserWindow : 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 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;