Remove layout during paint in Tab

chrome/browser/ui/views/tabs/tab.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_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_H_
 
 #include <list>
 #include <string>
 
@@ skipping 108 matching lines @@
   }
 
   views::GlowHoverController* hover_controller() {
     return &hover_controller_;
   }
 
   // Returns the width of the largest part of the tab that is available for the
   // user to click to select/activate the tab.
   int GetWidthOfLargestSelectableRegion() const;
 
+  // Called when stacked layout changes and the close button may need to
+  // be updated.
+  void HideCloseButtonForInactiveTabsChanged() { Layout(); }
+
   // Returns the inset within the first dragged tab to use when calculating the
   // "drag insertion point".  If we simply used the x-coordinate of the tab,
   // we'd be calculating based on a point well before where the user considers
   // the tab to "be".  The value here is chosen to "feel good" based on the
   // widths of the tab images and the tab overlap.
   //
   // Note that this must return a value smaller than the midpoint of any tab's
   // width, or else the user won't be able to drag a tab to the left of the
   // first tab in the strip.
   static int leading_width_for_drag() { return 16; }
@@ skipping 277 matching lines @@
   SkColor button_color_;
 
   // As the majority of the tabs are inactive, and painting tabs is slowish,
   // we cache a handful of the inactive tab backgrounds here.
   static ImageCache* image_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(Tab);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_H_