Switch to standard integer types in mojo/.

mojo/edk/system/platform_handle_dispatcher.h

 // Copyright 2014 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 MOJO_EDK_SYSTEM_PLATFORM_HANDLE_DISPATCHER_H_
 #define MOJO_EDK_SYSTEM_PLATFORM_HANDLE_DISPATCHER_H_
 
+#include <stddef.h>
+
 #include <utility>
 
 #include "mojo/edk/embedder/scoped_platform_handle.h"
 #include "mojo/edk/system/simple_dispatcher.h"
 #include "mojo/edk/system/system_impl_export.h"
 #include "mojo/public/cpp/system/macros.h"
 
 namespace mojo {
 namespace edk {
 
@@ skipping 38 matching lines @@
 
   ScopedPlatformHandle platform_handle_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(PlatformHandleDispatcher);
 };
 
 }  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_SYSTEM_PLATFORM_HANDLE_DISPATCHER_H_