Add basic support for "googDucking" to getUserMedia on Windows.

content/renderer/media/media_stream_dependency_factory.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/media/media_stream_dependency_factory.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 40 matching lines @@
 #include "media/base/android/media_codec_bridge.h"
 #endif
 
 namespace content {
 
 // Map of corresponding media constraints and platform effects.
 struct {
   const char* constraint;
   const media::AudioParameters::PlatformEffectsMask effect;
 } const kConstraintEffectMap[] = {
+  { content::kMediaStreamAudioDucking,
+    media::AudioParameters::DUCKING },
   { webrtc::MediaConstraintsInterface::kEchoCancellation,
-    media::AudioParameters::ECHO_CANCELLER},
+    media::AudioParameters::ECHO_CANCELLER },
 };
 
 class P2PPortAllocatorFactory : public webrtc::PortAllocatorFactoryInterface {
  public:
   P2PPortAllocatorFactory(
       P2PSocketDispatcher* socket_dispatcher,
       talk_base::NetworkManager* network_manager,
       talk_base::PacketSocketFactory* socket_factory,
       blink::WebFrame* web_frame)
       : socket_dispatcher_(socket_dispatcher),
@@ skipping 745 matching lines @@
 
 void MediaStreamDependencyFactory::StartAecDump(
     const base::PlatformFile& aec_dump_file) {
  // |pc_factory_| always takes ownership of |aec_dump_file|. If StartAecDump()
  // fails, |aec_dump_file| will be closed.
  if (!GetPcFactory()->StartAecDump(aec_dump_file))
    VLOG(1) << "Could not start AEC dump.";
 }
 
 }  // namespace content