Use precompiled headers for most large projects.

ppapi/tests/test_post_message.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 "ppapi/tests/test_post_message.h"
 
 #include <algorithm>
 
 #include "ppapi/c/dev/ppb_testing_dev.h"
 #include "ppapi/c/pp_var.h"
 #include "ppapi/cpp/dev/scriptable_object_deprecated.h"
 #include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/var.h"
 #include "ppapi/tests/test_utils.h"
 #include "ppapi/tests/testing_instance.h"
 
-// Windows defines 'PostMessage', so we have to undef it.
-#ifdef PostMessage
-#undef PostMessage
-#endif
-
 REGISTER_TEST_CASE(PostMessage);
 
 namespace {
 
 const char kTestString[] = "Hello world!";
 const bool kTestBool = true;
 const int32_t kTestInt = 42;
 const double kTestDouble = 42.0;
 const int32_t kThreadsToRun = 10;
 
@@ skipping 215 matching lines @@
   // Therefore, we will do CallOnMainThread to yield control.  That event should
   // fire, but we should see no messages when we return.
   TestCompletionCallback callback(instance_->pp_instance());
   pp::Module::Get()->core()->CallOnMainThread(0, callback);
   callback.WaitForResult();
   ASSERT_TRUE(message_data_.empty());
 
   PASS();
 }