Adding support for MediaStream and PeerConnection functionality

content/renderer/media/media_stream_impl.cc

 // Copyright (c) 2011 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_impl.h"
 
-#include "base/string_util.h"
+#include <vector>
+
+#include "base/logging.h"
+#include "base/synchronization/waitable_event.h"
+#include "base/utf_string_conversions.h"
+#include "content/common/media/media_stream_options.h"
 #include "content/renderer/media/capture_video_decoder.h"
+#include "content/renderer/media/media_stream_dispatcher.h"
+#include "content/renderer/media/rtc_video_decoder.h"
 #include "content/renderer/media/video_capture_impl_manager.h"
-#include "googleurl/src/gurl.h"
+#include "content/renderer/media/video_capture_module_impl.h"
+#include "content/renderer/media/webrtc_audio_device_impl.h"
+#include "content/renderer/p2p/ipc_network_manager.h"
+#include "content/renderer/p2p/ipc_socket_factory.h"
+#include "content/renderer/p2p/socket_dispatcher.h"
+#include "jingle/glue/thread_wrapper.h"
 #include "media/base/message_loop_factory.h"
-#include "media/base/pipeline.h"
+#include "third_party/libjingle/source/talk/p2p/client/httpportallocator.h"
+#include "third_party/libjingle/source/talk/session/phone/dummydevicemanager.h"
+#include "third_party/libjingle/source/talk/session/phone/webrtcmediaengine.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebKit.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebLocalMediaStream.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebMediaStream.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebMediaStreamController.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebMediaStreamRegistry.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebMediaStreamTrackList.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebMediaStreamTrack.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebSecurityOrigin.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebString.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebVector.h"
 
 namespace {
 
 static const int kVideoCaptureWidth = 352;
 static const int kVideoCaptureHeight = 288;
 static const int kVideoCaptureFramePerSecond = 30;
 
-static const int kStartOpenSessionId = 1;
-
-// TODO(wjia): remove this string when full media stream code is checked in.
-static const char kRawMediaScheme[] = "mediastream";
-
 }  // namespace
 
-MediaStreamImpl::MediaStreamImpl(VideoCaptureImplManager* vc_manager)
-    : vc_manager_(vc_manager) {
-}
-
-MediaStreamImpl::~MediaStreamImpl() {}
+MediaStreamImpl::MediaStreamImpl(
+    MediaStreamDispatcher* media_stream_dispatcher,
+    content::P2PSocketDispatcher* p2p_socket_dispatcher,
+    VideoCaptureImplManager* vc_manager)
+    : controller_(NULL),
+      media_stream_dispatcher_(media_stream_dispatcher),
+      media_engine_(NULL),
+      p2p_socket_dispatcher_(p2p_socket_dispatcher),
+      vc_manager_(vc_manager),
+      signaling_thread_(NULL),
+      worker_thread_(NULL),
+      chrome_worker_thread_("Chrome_libJingle_WorkerThread"),
+      call_state_(NOT_STARTED),
+      vcm_is_created_(false) {
+  message_loop_proxy_ = base::MessageLoopProxy::current();
+//  chrome_worker_thread_.Start();

[tommi (sloooow) - chröme, 2011/10/03 12:14:14]

remove or unintentional?

[Henrik Grunell, 2011/10/18 19:04:05]

Removed.

+}
+
+MediaStreamImpl::~MediaStreamImpl() {
+  if (peer_connection_native_.get()) {
+    peer_connection_native_->RegisterObserver(NULL);
+    peer_connection_native_->Close();
+  }
+}
+
+void MediaStreamImpl::setController(
+    WebKit::WebMediaStreamController* controller) {
+  controller_.reset(controller);
+}
+
+void MediaStreamImpl::shutdown() {
+  controller_.reset();
+}
+
+void MediaStreamImpl::generateStream(
+    int request_id,
+    WebKit::WebGenerateStreamOptionFlags flags,
+    const WebKit::WebSecurityOrigin& web_security_origin) {
+

[tommi (sloooow) - chröme, 2011/10/03 12:14:14]

no empty lines at the top of a function

[Henrik Grunell, 2011/10/18 19:04:05]

Done.

+  bool audio = (flags & WebKit::WebGenerateStreamRequestAudio) != 0;
+  media_stream::StreamOptions::VideoOption video_option =
+      media_stream::StreamOptions::kNoCamera;
+
+  if ((flags & WebKit::WebGenerateStreamRequestVideoFacingUser) &&
+      (flags & WebKit::WebGenerateStreamRequestVideoFacingEnvironment)) {
+    video_option = media_stream::StreamOptions::kFacingBoth;
+  } else {
+    if (flags & WebKit::WebGenerateStreamRequestVideoFacingEnvironment)
+      video_option = media_stream::StreamOptions::kFacingEnvironment;
+    if (flags & WebKit::WebGenerateStreamRequestVideoFacingUser)
+      video_option = media_stream::StreamOptions::kFacingUser;
+  }
+
+  VLOG(1) << "MediaStreamImpl::generateStream("
+          << request_id << ", [ "
+          << (audio ? "audio " : "")
+          << ((flags &
+              flags & WebKit::WebGenerateStreamRequestVideoFacingUser) ?
+              "video_facing_user " : "")
+          << ((flags &
+              WebKit::WebGenerateStreamRequestVideoFacingEnvironment) ?
+              "video_facing_environment " : "")
+          << "], "
+          << static_cast<string16>(web_security_origin.toString()) << ")";

[tommi (sloooow) - chröme, 2011/10/03 12:14:14]

is the cast necessary?  feels like if the cast is really needed that a new
object would be constructed

[Henrik Grunell, 2011/10/18 19:04:05]

Yes needed, WebString isn't handled. And yes an object is created.

+
+  media_stream_dispatcher_->GenerateStream(request_id, this,
+      media_stream::StreamOptions(audio, video_option),
+      UTF16ToUTF8(web_security_origin.toString()));
+}
+
+void MediaStreamImpl::stopGeneratedStream(
+    const WebKit::WebLocalMediaStream& stream) {
+  std::string label = UTF16ToUTF8(stream.label());
+  media_stream_dispatcher_->StopStream(label);
+}
+
+void MediaStreamImpl::recordStream(
+    const WebKit::WebMediaStreamRecorder& recorder) {
+  // TODO(grunell): Implement.
+}
+
+void MediaStreamImpl::getRecordedData(
+    const WebKit::WebMediaStreamRecorder& recorder,
+    int request_id) {
+  // TODO(grunell): Implement.
+}
+
+void MediaStreamImpl::disposeRecordedData(
+    const WebKit::WebMediaStreamRecorder& recorder) {
+  // TODO(grunell): Implement.
+}
+
+void MediaStreamImpl::setMediaStreamTrackEnabled(
+    const WebKit::WebMediaStreamTrack& track) {
+  // TODO(grunell): Implement.
+}
+
+void MediaStreamImpl::processSignalingMessage(
+    const WebKit::WebPeerConnection& peer_connection_web,
+    const WebKit::WebString& message) {
+  VLOG(1) << "MediaStreamImpl::processSignalingMessage("
+          << UTF16ToUTF8(message) << ")";
+  if (peer_connection_web != peer_connection_web_) {
+    DLOG(ERROR) << __FUNCTION__ << ": PeerConnection is not valid";
+    return;
+  }
+  DCHECK(peer_connection_native_.get());
+  peer_connection_native_->SignalingMessage(UTF16ToUTF8(message));
+}
+
+void MediaStreamImpl::message(
+    const WebKit::WebPeerConnection& peer_connection_web,
+    const WebKit::WebString& message) {
+  VLOG(1) << "MediaStreamImpl::message(" << UTF16ToUTF8(message) << ")";
+  if (peer_connection_web != peer_connection_web_) {
+    DLOG(ERROR) << __FUNCTION__ << ": PeerConnection is not valid";
+    return;
+  }
+  // TODO(grunell): Implement.
+}
+
+void MediaStreamImpl::addStream(
+    const WebKit::WebPeerConnection& peer_connection_web,
+    const WebKit::WebMediaStream& stream) {
+  VLOG(1) << "MediaStreamImpl::addStream("
+          << UTF16ToUTF8(stream.label()) << ")";
+
+  if (peer_connection_web != peer_connection_web_) {
+    DLOG(ERROR) << __FUNCTION__ << ": PeerConnection is not valid";
+    return;
+  }
+
+  // TODO(grunell): Fix code in this function after libjingle with new
+  // PeerConnection version has been rolled out.
+
+  if (call_state_ == NOT_STARTED) {
+    DCHECK(peer_connection_native_.get());
+    // TODO(grunell): Add audio and/or video depending on what's enabled
+    // in the stream.
+    std::string label = UTF16ToUTF8(stream.label());
+    std::string audioLabel = label;
+    audioLabel.append("-audio");
+    peer_connection_native_->AddStream(audioLabel, false);  // Audio
+    peer_connection_native_->AddStream(label, true);  // Video
+    local_label_ = label;
+    call_state_ = INITIATING;
+  }
+  if (call_state_ == INITIATING || call_state_ == RECEIVING) {
+    if (!vcm_is_created_) {
+      // Set the capture device
+      // TODO(grunell): instead of using the first track,
+      // the selected track should be used.
+      int id = media_stream_dispatcher_->video_session_id(local_label_, 0);
+      if (id != media_stream::StreamDeviceInfo::kNoId) {
+        webrtc::VideoCaptureModule* vcm = new VideoCaptureModuleImpl(
+            id, vc_manager_.get());
+        vcm_is_created_ = true;
+        media_engine_->SetVideoCaptureModule(vcm);
+        peer_connection_native_->SetVideoCapture("");
+      }
+    }
+    if (call_state_ == INITIATING)
+      peer_connection_native_->Connect();
+    else if (call_state_ == RECEIVING)
+      call_state_ = SENDING_AND_RECEIVING;
+  } else {
+    DLOG(ERROR) << __FUNCTION__ << ": Multiple calls not supported";
+    return;
+  }
+}
+
+void MediaStreamImpl::newPeerConnection(
+    const WebKit::WebPeerConnection& peer_connection_web,
+    const WebKit::WebString& configuration) {
+  if (peer_connection_native_.get()) {
+    LOG(ERROR) << __FUNCTION__ << ": A PeerConnection already exists";
+    return;
+  }
+
+  if (!media_engine_) {
+    webrtc::AudioDeviceModule* adm = new WebRtcAudioDeviceImpl();
+    webrtc::AudioDeviceModule* adm_sc = new WebRtcAudioDeviceImpl();
+    media_engine_ = new cricket::WebRtcMediaEngine(adm, adm_sc, NULL);
+  }
+
+  if (!signaling_thread_) {
+    jingle_glue::JingleThreadWrapper::EnsureForCurrentThread();
+    jingle_glue::JingleThreadWrapper::current()->set_send_allowed(true);
+    signaling_thread_ = jingle_glue::JingleThreadWrapper::current();
+  }
+
+  if (!worker_thread_) {
+    if (!chrome_worker_thread_.IsRunning()) {
+      if (!chrome_worker_thread_.Start()) {
+        LOG(ERROR) << __FUNCTION__ << ": Could not start worker thread";
+        return;
+      }
+    }
+    base::WaitableEvent event(true, false);
+    chrome_worker_thread_.message_loop()->PostTask(
+        FROM_HERE, NewRunnableMethod(
+            this, &MediaStreamImpl::InitializeWorkerThread,
+            &worker_thread_, &event));
+    event.Wait();
+    DCHECK(worker_thread_);
+  }
+
+  if (!pc_factory_.get()) {
+    ipc_network_manager_.reset(
+        new content::IpcNetworkManager(p2p_socket_dispatcher_));
+    ipc_socket_factory_.reset(
+        new content::IpcPacketSocketFactory(p2p_socket_dispatcher_));
+    cricket::HttpPortAllocator* port_allocator =
+        new cricket::HttpPortAllocator(ipc_network_manager_.get(),
+                                       ipc_socket_factory_.get(),
+                                       "PeerConnection");
+    // TODO(mallinath) - Following flags added to solve crash in HttpClient
+    port_allocator->set_flags(cricket::PORTALLOCATOR_DISABLE_TCP |
+                              cricket::PORTALLOCATOR_DISABLE_RELAY);
+
+    // TODO(mallinath) - PeerConnectionFactory constructor changed in latest
+    // code and it no more accepts config string. Config string must be parsed
+    // here and set in HttpPortAllocator. Now using standard google STUN server
+    // address.
+    std::vector<talk_base::SocketAddress> stun_hosts;
+    stun_hosts.push_back(talk_base::SocketAddress("stun.l.google.com", 19302));
+    port_allocator->SetStunHosts(stun_hosts);
+
+    pc_factory_.reset(
+        new webrtc::PeerConnectionFactory(port_allocator,
+                                          media_engine_,
+                                          new cricket::DummyDeviceManager(),
+                                          worker_thread_));
+    if (!pc_factory_->Initialize()) {
+      LOG(ERROR) << __FUNCTION__ << ": Could not initialize PeerConnection "
+                                    "factory";
+      return;
+    }
+  }
+
+  peer_connection_native_.reset(pc_factory_.get()->CreatePeerConnection(
+      signaling_thread_));
+  DCHECK(peer_connection_native_.get());
+  peer_connection_web_ = peer_connection_web;
+  peer_connection_native_->RegisterObserver(this);
+}
+
+void MediaStreamImpl::closePeerConnection(
+    const WebKit::WebPeerConnection& peer_connection_web) {
+  if (peer_connection_web != peer_connection_web_) {
+    DLOG(ERROR) << __FUNCTION__ << ": PeerConnection is not valid";
+    return;
+  }
+  // TODO(grunell): Fix code in this function after libjingle with new
+  // PeerConnection version has been rolled out.
+  if (call_state_ == RECEIVING || call_state_ == SENDING_AND_RECEIVING)
+    call_state_ = TERMINATING;
+  if (peer_connection_native_.get())
+    DeletePeerConnection();
+}
+
+void MediaStreamImpl::startNegotiation(
+    const WebKit::WebPeerConnection& peer_connection_web) {
+  if (peer_connection_web != peer_connection_web_) {
+    DLOG(ERROR) << __FUNCTION__ << ": PeerConnection is not valid";
+    return;
+  }
+  // TODO(grunell): Implement. Currently not supported in libjingle.
+}
+
+void MediaStreamImpl::removeStream(
+    const WebKit::WebPeerConnection& peer_connection_web,
+    const WebKit::WebMediaStream& stream) {
+  if (peer_connection_web != peer_connection_web_) {
+    DLOG(ERROR) << __FUNCTION__ << ": PeerConnection is not valid";
+    return;
+  }
+  // TODO(grunell): Implement. Currently not supported in libjingle.
+}
+
+void MediaStreamImpl::commitStreamChanges(
+    const WebKit::WebPeerConnection& peer_connection_web) {
+  if (peer_connection_web != peer_connection_web_) {
+    DLOG(ERROR) << __FUNCTION__ << ": PeerConnection is not valid";
+    return;
+  }
+  // TODO(grunell): Implement. Currently not supported in libjingle.
+}
 
 scoped_refptr<media::VideoDecoder> MediaStreamImpl::GetVideoDecoder(
     const GURL& url, media::MessageLoopFactory* message_loop_factory) {
-  bool raw_media = (url.spec().find(kRawMediaScheme) == 0);
-  media::VideoDecoder* decoder = NULL;
-  if (raw_media) {
+  std::string label =
+      UTF16ToUTF8(WebKit::WebMediaStreamRegistry::mediaStreamLabel(url));
+  if (label.empty())
+    return NULL;  // This is not a valid stream.
+
+  scoped_refptr<media::VideoDecoder> decoder;
+  if (media_stream_dispatcher_->IsStream(label)) {
+    // It's a local stream.
+    int video_session_id = media_stream_dispatcher_->video_session_id(label, 0);
     media::VideoCapture::VideoCaptureCapability capability;
     capability.width = kVideoCaptureWidth;
     capability.height = kVideoCaptureHeight;
     capability.max_fps = kVideoCaptureFramePerSecond;
     capability.expected_capture_delay = 0;
     capability.raw_type = media::VideoFrame::I420;
     capability.interlaced = false;
     capability.resolution_fixed = false;
-
     decoder = new CaptureVideoDecoder(
-        message_loop_factory->GetMessageLoopProxy("CaptureVideoDecoder").get(),
-        kStartOpenSessionId, vc_manager_.get(), capability);
+        message_loop_factory->GetMessageLoopProxy("CaptureVideoDecoderThread"),
+        video_session_id, vc_manager_.get(), capability);
+  } else {
+    // It's a remote stream.
+    DCHECK(label.size());
+    if (rtc_video_decoder_.get()) {
+      // The renderer is used by PeerConnection, release it first.
+      size_t found = label.rfind("-remote");
+      if (found != std::string::npos)
+        label = label.substr(0, found);
+      if (peer_connection_native_.get()) {
+        peer_connection_native_->SetVideoRenderer(label, NULL);
+      }
+    }
+    rtc_video_decoder_ = new RTCVideoDecoder(
+        message_loop_factory->GetMessageLoop("RtcVideoDecoderThread"),
+        url.spec());
+    decoder = rtc_video_decoder_;
+    size_t found = label.rfind("-remote");
+    if (found != std::string::npos)
+      label = label.substr(0, found);
+    if (peer_connection_native_.get()) {
+      peer_connection_native_->SetVideoRenderer(label, rtc_video_decoder_);
+    }
   }
   return decoder;
 }
+
+void MediaStreamImpl::OnStreamGenerated(
+    int request_id, const std::string& label,
+    const media_stream::StreamDeviceInfoArray& audio_array,
+    const media_stream::StreamDeviceInfoArray& video_array) {
+  VLOG(1) << "MediaStreamImpl::OnStreamGenerated(" << request_id << ", "
+          << label << ")";
+  DCHECK(controller_.get());
+
+  WebKit::WebVector<WebKit::WebMediaStreamTrack> web_track_vector(
+      audio_array.size() + video_array.size());
+
+  WebKit::WebString track_id(WebKit::WebString::fromUTF8(""));
+  WebKit::WebString track_kind(WebKit::WebString::fromUTF8("main"));
+  WebKit::WebString track_label_audio(
+      WebKit::WebString::fromUTF8("AudioDevice"));
+  WebKit::WebString track_label_video(
+      WebKit::WebString::fromUTF8("VideoCapture"));
+  unsigned int track_num = web_track_vector.size();
+  while (track_num--) {
+    if (track_num < audio_array.size()) {
+      web_track_vector[track_num].initialize(track_id,
+                                             track_kind,
+                                             track_label_audio);
+    } else {
+      web_track_vector[track_num].initialize(track_id,
+                                             track_kind,
+                                             track_label_video);
+    }
+  }
+
+  local_label_ = label;
+
+  WebKit::WebMediaStreamTrackList web_track_list;
+  web_track_list.initialize(web_track_vector);
+
+  WebKit::WebLocalMediaStream web_local_media_stream;
+  web_local_media_stream.initialize(UTF8ToUTF16(label), web_track_list);
+
+  controller_->streamGenerated(request_id, web_local_media_stream);
+}
+
+void MediaStreamImpl::OnStreamGenerationFailed(int request_id) {
+  VLOG(1) << "MediaStreamImpl::OnStreamGenerationFailed("
+          << request_id << ")\n";
+  DCHECK(controller_.get());
+  controller_->streamGenerationFailed(
+      request_id,
+      WebKit::WebMediaStreamController::ErrorPermissionDenied);
+}
+
+void MediaStreamImpl::OnVideoDeviceFailed(const std::string& label,
+                                          int index) {
+  VLOG(1) << "MediaStreamImpl::OnVideoDeviceFailed("
+          << label << ", " << index << ")\n";
+  DCHECK(controller_.get());
+  controller_->streamFailed(UTF8ToUTF16(label));
+}
+
+void MediaStreamImpl::OnAudioDeviceFailed(const std::string& label,
+                                          int index) {
+  VLOG(1) << "MediaStreamImpl::OnAudioDeviceFailed("
+          << label << ", " << index << ")\n";
+  DCHECK(controller_.get());
+  controller_->streamFailed(UTF8ToUTF16(label));
+}
+
+void MediaStreamImpl::OnError() {
+  VLOG(1) << "MediaStreamImpl::OnError()";
+}
+
+void MediaStreamImpl::OnSignalingMessage(const std::string& msg) {
+  VLOG(1) << "MediaStreamImpl::OnSignalingMessage(" << msg << ")";
+
+  if (!message_loop_proxy_->BelongsToCurrentThread()) {
+    message_loop_proxy_->PostTask(
+        FROM_HERE,
+        NewRunnableMethod(this, &MediaStreamImpl::OnSignalingMessage, msg));
+    return;
+  }
+
+  DCHECK(controller_.get());
+  controller_->onSignalingMessage(peer_connection_web_, UTF8ToUTF16(msg));
+}
+
+void MediaStreamImpl::OnAddStream(const std::string& stream_id, bool video) {
+  VLOG(1) << "MediaStreamImpl::OnAddStream(" << stream_id << ", "
+          << video << ")";
+
+  DCHECK(controller_.get());
+
+  // TODO(grunell): Fix code in this function after libjingle with new
+  // PeerConnection version has been rolled out.
+  if (video) {
+    if (call_state_ == NOT_STARTED) {
+      remote_label_ = stream_id;
+      call_state_ = RECEIVING;
+    } else if (call_state_ == INITIATING) {
+      std::string label = local_label_;
+      label += "-remote";
+      remote_label_ = label;
+      call_state_ = SENDING_AND_RECEIVING;
+    }
+
+    if (!message_loop_proxy_->BelongsToCurrentThread()) {
+      message_loop_proxy_->PostTask(
+          FROM_HERE,
+          NewRunnableMethod(this,
+              &MediaStreamImpl::OnAddStreamCallback,
+              remote_label_));
+      return;
+    } else {
+      OnAddStreamCallback(remote_label_);
+    }
+  }
+}
+
+void MediaStreamImpl::OnRemoveStream(const std::string& stream_id, bool video) {
+  VLOG(1) << "MediaStreamImpl::OnRemoveStream(" << stream_id << ", "
+          << video << ")";
+
+  if (video) {
+    if (!message_loop_proxy_->BelongsToCurrentThread()) {
+      message_loop_proxy_->PostTask(
+          FROM_HERE,
+          NewRunnableMethod(this,
+                            &MediaStreamImpl::OnRemoveStreamCallback,
+                            remote_label_));
+    } else {
+      OnRemoveStreamCallback(remote_label_);
+    }
+  }
+}
+
+void MediaStreamImpl::OnAddStreamCallback(const std::string& stream_label) {
+  size_t size = 1;
+  WebKit::WebVector<WebKit::WebMediaStreamTrack> web_track_vector(size);
+  web_track_vector[0].initialize(WebKit::WebString::fromUTF8(""),
+                                 WebKit::WebString::fromUTF8("main"),
+                                 WebKit::WebString::fromUTF8(stream_label));
+  WebKit::WebMediaStreamTrackList web_track_list;
+  web_track_list.initialize(web_track_vector);
+
+  WebKit::WebMediaStream web_media_stream;
+  web_media_stream.initialize(UTF8ToUTF16(stream_label), web_track_list);
+
+  controller_->onAddStream(peer_connection_web_, web_media_stream);
+}
+
+void MediaStreamImpl::OnRemoveStreamCallback(const std::string& stream_label) {
+  DCHECK(controller_.get());
+  controller_->onRemoveStream(peer_connection_web_, UTF8ToUTF16(stream_label));
+}
+
+void MediaStreamImpl::DeletePeerConnection() {
+  DCHECK(peer_connection_native_.get());
+  peer_connection_native_->RegisterObserver(NULL);
+  peer_connection_native_.reset();
+  peer_connection_web_.reset();
+  // TODO(grunell): Stop chrome_worker_thread_ here?
+  rtc_video_decoder_ = NULL;
+  media_engine_->SetVideoCaptureModule(NULL);
+  vcm_is_created_ = false;
+  call_state_ = NOT_STARTED;
+}
+
+void MediaStreamImpl::InitializeWorkerThread(talk_base::Thread** thread,
+                                             base::WaitableEvent* event) {
+  jingle_glue::JingleThreadWrapper::EnsureForCurrentThread();
+  jingle_glue::JingleThreadWrapper::current()->set_send_allowed(true);
+  *thread = jingle_glue::JingleThreadWrapper::current();
+  event->Signal();
+}