Suspected fix for a tab image caching bug.

chrome/browser/ui/views/tabs/tab_strip_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_STRIP_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_CONTROLLER_H_
 
 #include "base/strings/string16.h"
 #include "chrome/browser/ui/views/tabs/tab_strip_types.h"
 #include "third_party/skia/include/core/SkColor.h"
@@ skipping 82 matching lines @@
   virtual bool IsCompatibleWith(TabStrip* other) const = 0;
 
   // Creates the new tab.
   virtual void CreateNewTab() = 0;
 
   // Creates a new tab, and loads |location| in the tab. If |location| is a
   // valid URL, then simply loads the URL, otherwise this can open a
   // search-result page for |location|.
   virtual void CreateNewTabWithLocation(const base::string16& location) = 0;
 
-  // Returns true if the tab strip is in an incognito window.
+  // Returns true if the tab strip is in an incognito window.  This is used to
+  // determining which theme may have applied to it, so this determination
+  // should match the one in ThemeService::GetThemeProviderForProfile().
   virtual bool IsIncognito() = 0;
 
   // Invoked if the stacked layout (on or off) might have changed.
   virtual void StackedLayoutMaybeChanged() = 0;
 
   // Notifies controller that the user started dragging this tabstrip's tabs.
   virtual void OnStartedDraggingTabs() = 0;
 
   // Notifies controller that the user stopped dragging this tabstrip's tabs.
   // This is also called when the tabs that the user is dragging were detached
   // from this tabstrip but the user is still dragging the tabs.
   virtual void OnStoppedDraggingTabs() = 0;
 
   // Determines if the file type of the URL is supported. Should invoke
   // TabStrip::FileSupported to report the result.
   virtual void CheckFileSupported(const GURL& url) = 0;
 
   // Returns COLOR_TOOLBAR_TOP_SEPARATOR[,_INACTIVE] depending on the activation
   // state of the window.
   virtual SkColor GetToolbarTopSeparatorColor() const = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_CONTROLLER_H_