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

chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.cc

 // 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.
 
 #include "chrome/browser/ui/views/tabs/tab_drag_controller_interactive_uitest.h"
 
 #include "ash/wm/window_state.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 143 matching lines @@
 using test::GetTabStripForBrowser;
 
 TabDragControllerTest::TabDragControllerTest()
     : native_browser_list(BrowserList::GetInstance(
                               chrome::HOST_DESKTOP_TYPE_NATIVE)) {
 }
 
 TabDragControllerTest::~TabDragControllerTest() {
 }
 
-void TabDragControllerTest::SetUp() {
-  // TODO(danakj): Remove this when the tests are not flaky (crbug.com/270065)
-  // or we use test contexts in the renderer to keep things fast enough to
-  // avoid the flake (crbug.com/270918).
-  UseRealGLBindings();
-
-  InProcessBrowserTest::SetUp();
-}
-
 void TabDragControllerTest::StopAnimating(TabStrip* tab_strip) {
   tab_strip->StopAnimating(true);
 }
 
 void TabDragControllerTest::AddTabAndResetBrowser(Browser* browser) {
   AddBlankTabAndShow(browser);
   StopAnimating(GetTabStripForBrowser(browser));
   ResetIDs(browser->tab_strip_model(), 0);
 }
 
@@ skipping 2145 matching lines @@
                         DetachToDockedTabDragControllerTest,
                         ::testing::Values("mouse", "mouse docked"));
 INSTANTIATE_TEST_CASE_P(TabDragging,
                         DetachToBrowserTabDragControllerTestTouch,
                         ::testing::Values("touch", "touch docked"));
 #else
 INSTANTIATE_TEST_CASE_P(TabDragging,
                         DetachToBrowserTabDragControllerTest,
                         ::testing::Values("mouse"));
 #endif