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

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 24 matching lines @@
     resampler_audio_bus_ = AudioBus::Create(channels - 1, request_size);
     for (int i = 0; i < resampler_audio_bus_->channels(); ++i) {
       wrapped_resampler_audio_bus_->SetChannelData(
           i + 1, resampler_audio_bus_->channel(i));
     }
   }
 }
 
 MultiChannelResampler::~MultiChannelResampler() {}
 
+void MultiChannelResampler::PrimeWithSilence() {
+  DCHECK(!resamplers_.empty());
+  for (size_t i = 0; i < resamplers_.size(); ++i) {

[DaleCurtis, 2015/07/07 16:38:17]

No {} for single line please.

[henrika (OOO until Aug 14), 2015/07/08 12:22:59]

Done.

+    resamplers_[i]->PrimeWithSilence();
+  }
+}
+
 void MultiChannelResampler::Resample(int frames, AudioBus* audio_bus) {
   DCHECK_EQ(static_cast<size_t>(audio_bus->channels()), resamplers_.size());
 
   // Optimize the single channel case to avoid the chunking process below.
   if (audio_bus->channels() == 1) {
     resamplers_[0]->Resample(frames, audio_bus->channel(0));
     return;
   }
 
   // We need to ensure that SincResampler only calls ProvideInput once for each
@@ skipping 59 matching lines @@
 }
 
 
 double MultiChannelResampler::BufferedFrames() const {
   DCHECK(!resamplers_.empty());
   return resamplers_[0]->BufferedFrames();
 }
 
 
 }  // namespace media