Forces use mesa switch in mash_unittests and views_aura_mus_unittests

ui/views/mus/views_aura_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_aura_mus_test_suite.h"
 
 #include <memory>
 #include <string>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/run_loop.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/simple_thread.h"
 #include "base/threading/thread.h"
 #include "services/service_manager/background/background_service_manager.h"
 #include "services/service_manager/public/cpp/connector.h"
 #include "services/service_manager/public/cpp/service.h"
 #include "services/service_manager/public/cpp/service_context.h"
 #include "services/ui/common/switches.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/aura/mus/window_tree_host_mus.h"
 #include "ui/aura/test/env_test_helper.h"
 #include "ui/aura/window.h"
+#include "ui/gl/gl_switches.h"
 #include "ui/views/mus/desktop_window_tree_host_mus.h"
 #include "ui/views/mus/mus_client.h"
 #include "ui/views/mus/test_utils.h"
 #include "ui/views/test/platform_test_helper.h"
 #include "ui/views/test/views_test_helper_aura.h"
 #include "ui/views/views_delegate.h"
 #include "ui/views/widget/desktop_aura/desktop_native_widget_aura.h"
 
 namespace views {
 namespace {
@@ skipping 157 matching lines @@
 
 ViewsAuraMusTestSuite::~ViewsAuraMusTestSuite() {}
 
 void ViewsAuraMusTestSuite::Initialize() {
   PlatformTestHelper::SetIsAuraMusClient();
   // 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);
+
   ViewsTestSuite::Initialize();
   service_manager_connections_ = base::MakeUnique<ServiceManagerConnection>();
 }
 
 void ViewsAuraMusTestSuite::Shutdown() {
   service_manager_connections_.reset();
   ViewsTestSuite::Shutdown();
 }
 
 }  // namespace views