Fix extension toolstrip background update code

chrome/browser/views/extensions/extension_shelf.h

Index: chrome/browser/views/extensions/extension_shelf.h
===================================================================
--- chrome/browser/views/extensions/extension_shelf.h	(revision 26491)
+++ chrome/browser/views/extensions/extension_shelf.h	(working copy)
@@ -99,7 +99,7 @@
   void CollapseToolstrip(ExtensionHost* host, const GURL& url);
 
   // Initializes the background bitmaps for all views.
-  void InitBackground(gfx::Canvas* canvas, const SkRect& subset);
+  void InitBackground(gfx::Canvas* canvas);
 
   // Returns the Toolstrip at |x| coordinate.  If |x| is out of bounds, returns
   // NULL.
@@ -132,11 +132,6 @@
   // Background bitmap to draw under extension views.
   bool background_needs_repaint_;
 
-  // Whether the background we are remembering is for detached mode or not.
-  // This allows us to switch backgrounds and remember if we've done so, so that
-  // we don't have to do it over and over again.
-  bool background_for_detached_;
-
   // The browser this extension shelf belongs to.
   Browser* browser_;