Add some checks for MediaStreamAudioProcessor's fifo.

content/renderer/media/media_stream_audio_processor.cc

 // Copyright 2013 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 "content/renderer/media/media_stream_audio_processor.h"
 
 #include "base/command_line.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 193 matching lines @@
       for (int i = 0; i < destination_->bus()->channels(); ++i) {
         audio_source_intermediate_->SetChannelData(
             i,
             const_cast<float*>(source.channel(i)));
       }
       audio_source_intermediate_->set_frames(source.frames());
       source_to_push = audio_source_intermediate_.get();
     }
 
     if (fifo_) {
+      CHECK_LT(fifo_->frames(), destination_->bus()->frames());
       next_audio_delay_ = audio_delay +
           fifo_->frames() * base::TimeDelta::FromSeconds(1) / sample_rate_;
       fifo_->Push(source_to_push);
     } else {
+      CHECK(!data_available_);
       source_to_push->CopyTo(destination_->bus());
       next_audio_delay_ = audio_delay;
       data_available_ = true;
     }
   }
 
   // Returns true if there are destination_frames() of data available to be
   // consumed, and otherwise false.
   bool Consume(MediaStreamAudioBus** destination,
                base::TimeDelta* audio_delay) {
@@ skipping 480 matching lines @@
   if (echo_information_) {
     echo_information_.get()->UpdateAecDelayStats(ap->echo_cancellation());
   }
 
   // Return 0 if the volume hasn't been changed, and otherwise the new volume.
   return (agc->stream_analog_level() == volume) ?
       0 : agc->stream_analog_level();
 }
 
 }  // namespace content