Abstract OSMesa from the Layout tests

ui/views/mus/views_mus_test_suite.cc

 // Copyright 2016 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 "ui/views/mus/views_mus_test_suite.h"
 
 #include <memory>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 205 matching lines @@
 
 ViewsMusTestSuite::~ViewsMusTestSuite() {}
 
 void ViewsMusTestSuite::Initialize() {
   PlatformTestHelper::SetIsMus();
   // Let other services know that we're running in tests. Do this with a
   // command line flag to avoid making blocking calls to other processes for
   // setup for tests (e.g. to unlock the screen in the window manager).
   EnsureCommandLineSwitch(ui::switches::kUseTestConfig);
 
-  EnsureCommandLineSwitch(switches::kOverrideUseGLWithOSMesaForTests);
+  EnsureCommandLineSwitch(switches::kOverrideUseSoftwareGLForTests);
 
   ViewsTestSuite::Initialize();
   service_manager_connections_ = base::MakeUnique<ServiceManagerConnection>();
 }
 
 void ViewsMusTestSuite::Shutdown() {
   service_manager_connections_.reset();
   ViewsTestSuite::Shutdown();
 }
 
 }  // namespace views