Made OSMesa work on Mac for WebGL....

chrome/test/gpu/gpu_uitest.cc

 // Copyright (c) 2010 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 <string>
 
 #include "build/build_config.h"
 #include "chrome/test/ui/ui_test.h"
 #include "net/base/net_util.h"
 
 class GPUUITest : public UITest {
  protected:
   GPUUITest() {
   }
 
   virtual void SetUp() {
     UITest::SetUp();
     gpu_test_dir_ = test_data_directory_.AppendASCII("gpu");
   }
 
   FilePath gpu_test_dir_;
 };
 
-// TODO(apatrick): OSMesa is flaky on Mac. http://crbug/61037
-#if defined(OS_MACOSX)
-#define MAYBE_UITestLaunchedWithOSMesa DISABLED_UITestLaunchedWithOSMesa
-#else
-#define MAYBE_UITestLaunchedWithOSMesa UITestLaunchedWithOSMesa
-#endif
-
-TEST_F(GPUUITest, MAYBE_UITestLaunchedWithOSMesa) {
+TEST_F(GPUUITest, UITestLaunchedWithOSMesa) {
   // Check the webgl test reports success and that the renderer was OSMesa.
   // We use OSMesa for tests in order to get consistent results across a
   // variety of boxes.
   NavigateToURL(
       net::FilePathToFileURL(gpu_test_dir_.AppendASCII("webgl.html")));
 
   EXPECT_EQ(std::wstring(L"SUCCESS: Mesa OffScreen"), GetActiveTabTitle());
 }