Use a mocked compositor for unit tests

views/run_all_unittests.cc

 // Copyright (c) 2011 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 "base/test/test_suite.h"
+#include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/ui_base_paths.h"
 #include "views/view.h"
 
 class ViewTestSuite : public base::TestSuite {
  public:
   ViewTestSuite(int argc, char** argv) : base::TestSuite(argc, argv) {}
 
  protected:
   virtual void Initialize() {
     base::TestSuite::Initialize();
 
     ui::RegisterPathProvider();
     ui::ResourceBundle::InitSharedInstance("en-US");
 
-#if defined(OS_LINUX)
-    // Disable GPU browser compositor during unit tests.
-    views::View::set_use_acceleration_when_possible(false);
-#endif
+    // Mock out the compositor on platforms that use it.
+    ui::gfx_test_utils::SetupTestCompositor();
   }
 };
 
 int main(int argc, char** argv) {
   return ViewTestSuite(argc, argv).Run();
 }