Introduce AudioOutputResampler for browser side resampling.

media/base/multi_channel_resampler.cc

 // 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.
 
 #include "media/base/multi_channel_resampler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
 #include "media/base/audio_bus.h"
@@ skipping 76 matching lines @@
     // All channels must ask for the same amount.  This should always be the
     // case, but let's just make sure.
     DCHECK_EQ(frames, last_frame_count_);
 
     // Copy the channel data from what we received from |read_cb_|.
     memcpy(destination, resampler_audio_bus_->channel(channel),
            sizeof(*resampler_audio_bus_->channel(channel)) * frames);
   }
 }
 
+void MultiChannelResampler::Flush() {
+  last_frame_count_ = 0;
+  for (size_t i = 0; i < resamplers_.size(); ++i)
+    resamplers_[i]->Flush();
+}
+
 }  // namespace media