Adds clipping to the tabs when stacked. This is necessary so we don't

chrome/browser/ui/views/tabs/tab_controller.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_VIEWS_TABS_TAB_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_CONTROLLER_H_
 #pragma once
 
 class BaseTab;
 class TabStripSelectionModel;
@@ skipping 60 matching lines @@
 
   // Returns the tab that contains the specified coordinates, in terms of |tab|,
   // or NULL if there is no tab that contains the specified point.
   virtual BaseTab* GetTabAt(BaseTab* tab,
                             const gfx::Point& tab_in_tab_coordinates) = 0;
 
   // Informs that an active tab is selected when already active (ie - clicked
   // when already active/foreground).
   virtual void ClickActiveTab(const BaseTab* tab) const = 0;
 
+  // Returns true if |tab| needs to be painted. If false is returned the tab is
+  // not painted. If true is returned the tab should be painted and |clip| is
+  // set to the clip (if |clip| is empty means no clip).
+  virtual bool ShouldPaintTab(const BaseTab* tab, gfx::Rect* clip) = 0;
+
  protected:
   virtual ~TabController() {}
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_CONTROLLER_H_