Fixes issue where Web Speech API drops a frame every 5.1 seconds

media/base/multi_channel_resampler.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 MEDIA_BASE_MULTI_CHANNEL_RESAMPLER_H_
 #define MEDIA_BASE_MULTI_CHANNEL_RESAMPLER_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 17 matching lines @@
   // Constructs a MultiChannelResampler with the specified |read_cb|, which is
   // used to acquire audio data for resampling.  |io_sample_rate_ratio| is the
   // ratio of input / output sample rates.  |request_frames| is the size in
   // frames of the AudioBus to be filled by |read_cb|.
   MultiChannelResampler(int channels,
                         double io_sample_rate_ratio,
                         size_t request_frames,
                         const ReadCB& read_cb);
   virtual ~MultiChannelResampler();
 
+  void PrimeWithSilence();
+
   // Resamples |frames| of data from |read_cb_| into AudioBus.
   void Resample(int frames, AudioBus* audio_bus);
 
   // Flush all buffered data and reset internal indices.  Not thread safe, do
   // not call while Resample() is in progress.
   void Flush();
 
   // Update ratio for all SincResamplers.  SetRatio() will cause reconstruction
   // of the kernels used for resampling.  Not thread safe, do not call while
   // Resample() is in progress.
@@ skipping 27 matching lines @@
   // The number of output frames that have successfully been processed during
   // the current Resample() call.
   int output_frames_ready_;
 
   DISALLOW_COPY_AND_ASSIGN(MultiChannelResampler);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_MULTI_CHANNEL_RESAMPLER_H_