Make cc_unittests and webkit_compositor_unittests executable always

webkit/compositor/test/run_all_unittests.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 <base/test/test_suite.h>
-#include <gmock/gmock.h>
-#include <webkit/support/webkit_support.h>
-
-int main(int argc, char** argv) {
-  ::testing::InitGoogleMock(&argc, argv);
-  TestSuite testSuite(argc, argv);
-  webkit_support::SetUpTestEnvironmentForUnitTests();
-  int result = testSuite.Run();
-  webkit_support::TearDownTestEnvironment();
-
-  return result;
-}
-