Switch to standard integer types in ppapi/.

ppapi/proxy/ppb_testing_proxy.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 "ppapi/proxy/ppb_testing_proxy.h"
 
+#include <stddef.h>
+
 #include "base/message_loop/message_loop.h"
 #include "ppapi/c/private/ppb_testing_private.h"
 #include "ppapi/proxy/enter_proxy.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/shared_impl/ppapi_globals.h"
 #include "ppapi/shared_impl/proxy_lock.h"
 #include "ppapi/shared_impl/resource.h"
 #include "ppapi/shared_impl/resource_tracker.h"
 #include "ppapi/thunk/enter.h"
@@ skipping 234 matching lines @@
                                         input_event_impl->pp_resource());
 }
 
 void PPB_Testing_Proxy::OnMsgSetMinimumArrayBufferSizeForShmem(
     uint32_t threshold) {
   RawVarDataGraph::SetMinimumArrayBufferSizeForShmemForTest(threshold);
 }
 
 }  // namespace proxy
 }  // namespace ppapi