Use stub GL draw/clear calls for browser tests that do not need pixels.

chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.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_DRAG_CONTROLLER_INTERACTIVE_UITEST_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_DRAG_CONTROLLER_INTERACTIVE_UITEST_H_
 
 #include <string>
 
 #include "chrome/test/base/in_process_browser_test.h"
@@ skipping 15 matching lines @@
 class View;
 }
 
 // TabDragControllerTest is the basis for the two tests that exercise
 // TabDragController.
 class TabDragControllerTest : public InProcessBrowserTest {
  public:
   TabDragControllerTest();
   virtual ~TabDragControllerTest();
 
-  virtual void SetUp() OVERRIDE;
-
   // Cover for TabStrip::StopAnimating(true).
   void StopAnimating(TabStrip* tab_strip);
 
   // Adds a new blank tab to |browser|, stops animations and resets the ids of
   // the tabs in |browser|.
   void AddTabAndResetBrowser(Browser* browser);
 
   // Creates a new Browser and resizes |browser()| and the new browser to be
   // side by side.
   Browser* CreateAnotherWindowBrowserAndRelayout();
@@ skipping 21 matching lines @@
 // id of the first tab is set to |start|, the second tab |start + 1| ...
 void ResetIDs(TabStripModel* model, int start);
 
 // Returns a string representation of the ids of the tabs in |model|. Each id
 // is separated by a space.
 std::string IDString(TabStripModel* model);
 
 }  // namespace test
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_DRAG_CONTROLLER_INTERACTIVE_UITEST_H_