Miscellaneous AudioRendererImpl cleanup salvaged from http://codereview.chromium.org/10918022/.

media/filters/audio_renderer_impl.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.
 
 // Audio rendering unit utilizing an AudioRendererSink to output data.
 //
 // This class lives inside three threads during it's lifetime, namely:
 // 1. Render thread.
 //    This object is created on the render thread.
 // 2. Pipeline thread
@@ skipping 179 matching lines @@
   base::Closure underflow_cb_;
   TimeCB time_cb_;
   base::Closure ended_cb_;
   base::Closure disabled_cb_;
   PipelineStatusCB error_cb_;
 
   base::TimeDelta preroll_timestamp_;
 
   uint32 bytes_per_frame_;
 
-  // Used to calculate audio delay given bytes.
-  uint32 bytes_per_second_;
-
   // A flag that indicates this filter is called to stop.
   bool stopped_;
 
   // The sink (destination) for rendered audio.
   scoped_refptr<media::AudioRendererSink> sink_;
 
-  // Set to true when OnInitialize() is called.
-  bool is_initialized_;
-
   // We're supposed to know amount of audio data OS or hardware buffered, but
   // that is not always so -- on my Linux box
   // AudioBuffersState::hardware_delay_bytes never reaches 0.
   //
   // As a result we cannot use it to find when stream ends. If we just ignore
   // buffered data we will notify host that stream ended before it is actually
   // did so, I've seen it done ~140ms too early when playing ~150ms file.
   //
   // Instead of trying to invent OS-specific solution for each and every OS we
   // are supporting, use simple workaround: every time we fill the buffer we
@@ skipping 10 matching lines @@
   // True if the renderer receives a buffer with kAborted status during preroll,
   // false otherwise. This flag is cleared on the next Preroll() call.
   bool preroll_aborted_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_AUDIO_RENDERER_IMPL_H_