Switch to standard integer types in ppapi/.

ppapi/cpp/message_loop.h

 // 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.
 
 #ifndef PPAPI_CPP_MESSAGE_LOOP_H_
 #define PPAPI_CPP_MESSAGE_LOOP_H_
 
+#include <stdint.h>
+
 #include "ppapi/cpp/resource.h"
 
 /// @file
 /// This file defines the PPB_MessageLoop API.
 
 namespace pp {
 
 class CompletionCallback;
 class InstanceHandle;
 
@@ skipping 241 matching lines @@
   ///   - PP_ERROR_BADRESOURCE: The message loop was invalid.
   ///   - PP_ERROR_WRONG_THREAD: You are attempting to quit the main thread.
   ///     The main thread's message loop is managed by the system and can't be
   ///     quit.
   int32_t PostQuit(bool should_destroy);
 };
 
 }  // namespace pp
 
 #endif  // PPAPI_CPP_MESSAGE_LOOP_H_