Switch to standard integer types in ppapi/.

ppapi/shared_impl/media_stream_buffer_manager.cc

 // 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.
 
 #include "ppapi/shared_impl/media_stream_buffer_manager.h"
 
+#include <stddef.h>
+
 #include <utility>
 
 #include "base/logging.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/shared_impl/media_stream_buffer.h"
 
 namespace ppapi {
 
 MediaStreamBufferManager::Delegate::~Delegate() {}
 
@@ skipping 61 matching lines @@
   return !buffer_queue_.empty();
 }
 
 MediaStreamBuffer* MediaStreamBufferManager::GetBufferPointer(int32_t index) {
   if (index < 0 || index >= number_of_buffers_)
     return NULL;
   return buffers_[index];
 }
 
 }  // namespace ppapi