Enable platform echo cancellation through the AudioRecord path.

content/browser/renderer_host/media/audio_input_device_manager.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 "content/browser/renderer_host/media/audio_input_device_manager.h"
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/common/media_stream_request.h"
@@ skipping 169 matching lines @@
     input_params.sample_rate = 44100;
     input_params.channel_layout = media::CHANNEL_LAYOUT_STEREO;
   } else {
     // Get the preferred sample rate and channel configuration for the
     // audio device.
     media::AudioParameters params =
         audio_manager_->GetInputStreamParameters(info.device.id);
     input_params.sample_rate = params.sample_rate();
     input_params.channel_layout = params.channel_layout();
     input_params.frames_per_buffer = params.frames_per_buffer();
+    input_params.effects = params.effects();
 
     // Add preferred output device information if a matching output device
     // exists.
     out.device.matched_output_device_id =
         audio_manager_->GetAssociatedOutputDeviceID(info.device.id);
     if (!out.device.matched_output_device_id.empty()) {
       params = audio_manager_->GetOutputStreamParameters(
           out.device.matched_output_device_id);
       MediaStreamDevice::AudioDeviceParameters& matched_output_params =
           out.device.matched_output;
@@ skipping 48 matching lines @@
   for (StreamDeviceList::iterator i(devices_.begin()); i != devices_.end();
        ++i) {
     if (i->session_id == session_id)
       return i;
   }
 
   return devices_.end();
 }
 
 }  // namespace content