Introduce AudioBufferMemoryPool to avoid thrashing on audio buffers.

content/renderer/pepper/content_decryptor_delegate.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 CONTENT_RENDERER_PEPPER_CONTENT_DECRYPTOR_DELEGATE_H_
 #define CONTENT_RENDERER_PEPPER_CONTENT_DECRYPTOR_DELEGATE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
 #include <queue>
 #include <string>
 #include <vector>
 
 #include "base/callback_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
+#include "media/base/audio_buffer.h"
 #include "media/base/cdm_promise.h"
 #include "media/base/cdm_promise_adapter.h"
 #include "media/base/cdm_session_tracker.h"
 #include "media/base/channel_layout.h"
 #include "media/base/content_decryption_module.h"
 #include "media/base/decryptor.h"
 #include "media/base/sample_format.h"
 #include "ppapi/c/pp_time.h"
 #include "ppapi/c/private/pp_content_decryptor.h"
 #include "ppapi/c/private/ppp_content_decryptor_private.h"
@@ skipping 205 matching lines @@
 
   // Keep track of audio parameters.
   int audio_samples_per_second_;
   int audio_channel_count_;
   media::ChannelLayout audio_channel_layout_;
 
   media::CdmPromiseAdapter cdm_promise_adapter_;
 
   media::CdmSessionTracker cdm_session_tracker_;
 
+  scoped_refptr<media::AudioBufferMemoryPool> pool_;
+
   base::WeakPtr<ContentDecryptorDelegate> weak_this_;
   base::WeakPtrFactory<ContentDecryptorDelegate> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentDecryptorDelegate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_CONTENT_DECRYPTOR_DELEGATE_H_