Enable platform echo cancellation through the AudioRecord path.

content/browser/renderer_host/media/audio_renderer_host_unittest.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 "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "base/sync_socket.h"
 #include "content/browser/media/media_internals.h"
 #include "content/browser/renderer_host/media/audio_input_device_manager.h"
@@ skipping 180 matching lines @@
     media::AudioParameters params;
     if (unified_stream) {
       // Use AudioInputDeviceManager::kFakeOpenSessionId as the session id to
       // pass the permission check.
       session_id = AudioInputDeviceManager::kFakeOpenSessionId;
       params = media::AudioParameters(
           media::AudioParameters::AUDIO_FAKE,
           media::CHANNEL_LAYOUT_STEREO,
           2,
           media::AudioParameters::kAudioCDSampleRate, 16,
-          media::AudioParameters::kAudioCDSampleRate / 10);
+          media::AudioParameters::kAudioCDSampleRate / 10,
+          media::AudioParameters::NO_EFFECTS);
     } else {
       session_id = 0;
       params = media::AudioParameters(
           media::AudioParameters::AUDIO_FAKE,
           media::CHANNEL_LAYOUT_STEREO,
           media::AudioParameters::kAudioCDSampleRate, 16,
           media::AudioParameters::kAudioCDSampleRate / 10);
     }
     host_->OnCreateStream(kStreamId, kRenderViewId, session_id, params);
 
@@ skipping 130 matching lines @@
 }
 
 TEST_F(AudioRendererHostTest, CreateUnifiedStreamAndClose) {
   Create(true);
   Close();
 }
 
 // TODO(hclam): Add tests for data conversation in low latency mode.
 
 }  // namespace content