Enable platform echo cancellation through the AudioRecord path.

content/browser/renderer_host/media/audio_input_device_manager.cc

Index: content/browser/renderer_host/media/audio_input_device_manager.cc
diff --git a/content/browser/renderer_host/media/audio_input_device_manager.cc b/content/browser/renderer_host/media/audio_input_device_manager.cc
index 00cd4354ae37811852451996fa47f38a053ef497..3679ad0f257d8a8a9693edaccc792d97bb61c66e 100644
--- a/content/browser/renderer_host/media/audio_input_device_manager.cc
+++ b/content/browser/renderer_host/media/audio_input_device_manager.cc
@@ -35,7 +35,7 @@ AudioInputDeviceManager::AudioInputDeviceManager(
                                media::AudioManagerBase::kDefaultDeviceName,
                                media::AudioManagerBase::kDefaultDeviceId,
                                44100, media::CHANNEL_LAYOUT_STEREO,
-                               0);
+                               0, false);
   fake_device.session_id = kFakeOpenSessionId;
   devices_.push_back(fake_device);
 }
@@ -170,7 +170,7 @@ void AudioInputDeviceManager::OpenOnDeviceThread(
   DCHECK(IsOnDeviceThread());
 
   StreamDeviceInfo out(info.device.type, info.device.name, info.device.id,
-                       0, 0, 0);
+                       0, 0, 0, false);
   out.session_id = session_id;
 
   MediaStreamDevice::AudioDeviceParameters& input_params = out.device.input;
@@ -187,6 +187,7 @@ void AudioInputDeviceManager::OpenOnDeviceThread(
     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.use_platform_aec = params.use_platform_aec();
 
     // Add preferred output device information if a matching output device
     // exists.