Make setRemoteDescription, setLocalDescription et al async.

content/renderer/media/rtc_peer_connection_handler.h

 // 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.
 
 #ifndef CONTENT_RENDERER_MEDIA_RTC_PEER_CONNECTION_HANDLER_H_
 #define CONTENT_RENDERER_MEDIA_RTC_PEER_CONNECTION_HANDLER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 73 matching lines @@
 // messages going between WebKit and native PeerConnection in libjingle. It's
 // owned by WebKit.
 // WebKit calls all of these methods on the main render thread.
 // Callbacks to the webrtc::PeerConnectionObserver implementation also occur on
 // the main render thread.
 class CONTENT_EXPORT RTCPeerConnectionHandler
     : NON_EXPORTED_BASE(public blink::WebRTCPeerConnectionHandler) {
  public:
   RTCPeerConnectionHandler(
       blink::WebRTCPeerConnectionHandlerClient* client,
-      PeerConnectionDependencyFactory* dependency_factory,
-      const scoped_refptr<base::SingleThreadTaskRunner>& signaling_thread);
+      PeerConnectionDependencyFactory* dependency_factory);
   virtual ~RTCPeerConnectionHandler();
 
   // Destroy all existing RTCPeerConnectionHandler objects.
   static void DestructAllHandlers();
 
   static void ConvertOfferOptionsToConstraints(
       const blink::WebRTCOfferOptions& options,
       RTCMediaConstraints* output);
 
   void associateWithFrame(blink::WebFrame* frame);
@@ skipping 91 matching lines @@
       const scoped_refptr<webrtc::MediaStreamInterface>& stream);
   void OnDataChannel(scoped_ptr<RtcDataChannelHandler> handler);
   void OnIceCandidate(const std::string& sdp, const std::string& sdp_mid,
       int sdp_mline_index, int component, int address_family);
 
  private:
   webrtc::SessionDescriptionInterface* CreateNativeSessionDescription(
       const std::string& sdp, const std::string& type,
       webrtc::SdpParseError* error);
 
+  // Virtual to allow mocks to override.
+  virtual scoped_refptr<base::SingleThreadTaskRunner> signaling_thread() const;
+
+  void RunSynchronousClosureOnSignalingThread(const base::Closure& closure,
+                                              const char* trace_event_name);
+
   base::ThreadChecker thread_checker_;
 
   // |client_| is a weak pointer, and is valid until stop() has returned.
   blink::WebRTCPeerConnectionHandlerClient* client_;
 
   // |dependency_factory_| is a raw pointer, and is valid for the lifetime of
   // RenderThreadImpl.
   PeerConnectionDependencyFactory* const dependency_factory_;
 
   blink::WebFrame* frame_;
 
-  // Libjingle's signaling thread.
-  const scoped_refptr<base::SingleThreadTaskRunner> signaling_thread_;
-
   ScopedVector<WebRtcMediaStreamAdapter> local_streams_;
 
   base::WeakPtr<PeerConnectionTracker> peer_connection_tracker_;
 
   MediaStreamTrackMetrics track_metrics_;
 
   // Counter for a UMA stat reported at destruction time.
   int num_data_channels_created_;
 
   // Counter for number of IPv4 and IPv6 local candidates.
@@ skipping 10 matching lines @@
   scoped_refptr<webrtc::UMAObserver> uma_observer_;
   base::TimeTicks ice_connection_checking_start_;
   base::WeakPtrFactory<RTCPeerConnectionHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RTCPeerConnectionHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_RTC_PEER_CONNECTION_HANDLER_H_