Move the refcounting from the proxy/impl resource object to the shared resource object base class.

ppapi/shared_impl/audio_impl.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/shared_impl/audio_impl.h"
 
 #include "base/logging.h"
 
 namespace ppapi {
 
 AudioImpl::AudioImpl()
     : playing_(false),
       shared_memory_size_(0),
       callback_(NULL),
       user_data_(NULL) {
 }
 
 AudioImpl::~AudioImpl() {
   // Closing the socket causes the thread to exit - wait for it.
   if (socket_.get())
     socket_->Close();
   if (audio_thread_.get()) {
     audio_thread_->Join();
     audio_thread_.reset();
   }
 }
 
-::ppapi::thunk::PPB_Audio_API* AudioImpl::AsPPB_Audio_API() {
-  return this;
-}
-
 void AudioImpl::SetCallback(PPB_Audio_Callback callback, void* user_data) {
   callback_ = callback;
   user_data_ = user_data;
 }
 
 void AudioImpl::SetStartPlaybackState() {
   DCHECK(!playing_);
   DCHECK(!audio_thread_.get());
 
   // If the socket doesn't exist, that means that the plugin has started before
@@ skipping 45 matching lines @@
   void* buffer = shared_memory_->memory();
 
   while (sizeof(pending_data) ==
       socket_->Receive(&pending_data, sizeof(pending_data)) &&
       pending_data >= 0) {
     callback_(buffer, shared_memory_size_, user_data_);
   }
 }
 
 }  // namespace ppapi