Remove unused AudioBuffersState member.

media/audio/audio_buffers_state.h

 // 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.
 
 #ifndef MEDIA_AUDIO_AUDIO_BUFFERS_STATE_H_
 #define MEDIA_AUDIO_AUDIO_BUFFERS_STATE_H_
 
-#include "base/time.h"
 #include "media/base/media_export.h"
 
-// AudioBuffersState struct stores current state of audio buffers along with
-// the timestamp of the moment this state corresponds to. It is used for audio
-// synchronization.
+// AudioBuffersState struct stores current state of audio buffers.
+// It is used for audio synchronization.
 struct MEDIA_EXPORT AudioBuffersState {
-  AudioBuffersState();
-  AudioBuffersState(int pending_bytes, int hardware_delay_bytes);
+  AudioBuffersState() : pending_bytes(0), hardware_delay_bytes(0) {

[vrk (LEFT CHROMIUM), 2012/03/12 18:45:01]

As per Chromium style guide, don't inline empty ctors/dtrs:
http://dev.chromium.org/developers/coding-style#TOC-Inline-functions

+  }
 
-  int total_bytes();
+  AudioBuffersState(int pending_bytes, int hardware_delay_bytes)
+      : pending_bytes(pending_bytes),
+        hardware_delay_bytes(hardware_delay_bytes) {
+  }
+
+  int total_bytes() {
+    return pending_bytes + hardware_delay_bytes;
+  }
 
   // Number of bytes we currently have in our software buffer.
   int pending_bytes;
 
   // Number of bytes that have been written to the device, but haven't
   // been played yet.
   int hardware_delay_bytes;
-
-  // Timestamp of the moment when the buffers state was captured. It is used
-  // to account for the time it takes to deliver AudioBuffersState from
-  // the browser process to the renderer.
-  base::Time timestamp;
 };
 
-
 #endif  // MEDIA_AUDIO_AUDIO_BUFFERS_STATE_H_