Enable platform echo cancellation through the AudioRecord path.

content/renderer/renderer_webkitplatformsupport_impl.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/renderer/renderer_webkitplatformsupport_impl.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
 #include "base/memory/shared_memory.h"
@@ skipping 708 matching lines @@
       !base::StringToInt(UTF16ToUTF8(input_device_id), &session_id)) {
     if (input_channels > 0)
       DLOG(WARNING) << "createAudioDevice(): request for audio input ignored";
 
     input_channels = 0;
   }
 
   media::AudioParameters params(
       media::AudioParameters::AUDIO_PCM_LOW_LATENCY,
       layout, input_channels,
-      static_cast<int>(sample_rate), 16, buffer_size);
+      static_cast<int>(sample_rate), 16, buffer_size,
+      media::AudioParameters::NO_EFFECTS);
 
   return new RendererWebAudioDeviceImpl(params, callback, session_id);
 }
 
 #if defined(OS_ANDROID)
 bool RendererWebKitPlatformSupportImpl::loadAudioResource(
     blink::WebAudioBus* destination_bus, const char* audio_file_data,
     size_t data_size, double sample_rate) {
   return DecodeAudioFileData(destination_bus,
                              audio_file_data,
@@ skipping 332 matching lines @@
     return;
   QuotaDispatcher::ThreadSpecificInstance(
       thread_safe_sender_.get(),
       quota_message_filter_.get())->QueryStorageUsageAndQuota(
           storage_partition,
           static_cast<quota::StorageType>(type),
           QuotaDispatcher::CreateWebStorageQuotaCallbacksWrapper(callbacks));
 }
 
 }  // namespace content