Add a fast path for tab strip expose.

chrome/browser/gtk/tabs/tab_renderer_gtk.h

 // Copyright (c) 2006-2008 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_GTK_TABS_TAB_RENDERER_GTK_H_
 #define CHROME_BROWSER_GTK_TABS_TAB_RENDERER_GTK_H_
 
 #include <gtk/gtk.h>
 #include <map>
 
@@ skipping 121 matching lines @@
   virtual void CloseButtonClicked();
 
   // Sets the bounds of the tab.
   virtual void SetBounds(const gfx::Rect& bounds);
 
   // Advance the loading animation to the next frame, or hide the animation if
   // the tab isn't loading.  Returns |true| if the icon area needs to be
   // repainted.
   bool ValidateLoadingAnimation(AnimationState animation_state);
 
+  // Repaint only the area of the tab that contains the favicon.
+  void PaintFavIconArea(GdkEventExpose* event);
+
   // Returns the minimum possible size of a single unselected Tab.
   static gfx::Size GetMinimumUnselectedSize();
   // Returns the minimum possible size of a selected Tab. Selected tabs must
   // always show a close button and have a larger minimum size than unselected
   // tabs.
   static gfx::Size GetMinimumSelectedSize();
   // Returns the preferred size of a single Tab, assuming space is
   // available.
   static gfx::Size GetStandardSize();
 
@@ skipping 224 matching lines @@
   // The close button.
   scoped_ptr<CustomDrawButton> close_button_;
 
   // The current color of the close button.
   SkColor close_button_color_;
 
   DISALLOW_COPY_AND_ASSIGN(TabRendererGtk);
 };
 
 #endif  // CHROME_BROWSER_GTK_TABS_TAB_RENDERER_GTK_H_