Adding PeerConnectionInterface::SetConfiguration method.

talk/app/webrtc/peerconnectioninterface.h

Index: talk/app/webrtc/peerconnectioninterface.h
diff --git a/talk/app/webrtc/peerconnectioninterface.h b/talk/app/webrtc/peerconnectioninterface.h
index a3af0e715c7fc0422eed011f8bafc7c6d5ad7c4f..2bffe57fb62153dc09b9a8df16bd77807223ed7e 100644
--- a/talk/app/webrtc/peerconnectioninterface.h
+++ b/talk/app/webrtc/peerconnectioninterface.h
@@ -365,8 +365,16 @@ class PeerConnectionInterface : public rtc::RefCountInterface {
                                     SessionDescriptionInterface* desc) = 0;
   // Restarts or updates the ICE Agent process of gathering local candidates
   // and pinging remote candidates.
+  // TODO(deadbeef): Remove once Chrome is moved over to SetConfiguration.
   virtual bool UpdateIce(const IceServers& configuration,
                          const MediaConstraintsInterface* constraints) = 0;
+  // Sets the PeerConnection's global configuration to |config|.
+  // Any changes to STUN/TURN servers or ICE candidate policy will affect the
+  // next gathering phase, and cause the next call to createOffer to generate
+  // new ICE credentials. Note that the BUNDLE and RTCP-multiplexing policies
+  // cannot be changed with this method.
+  virtual bool SetConfiguration(
+      const PeerConnectionInterface::RTCConfiguration& config) = 0;
   // Provides a remote candidate to the ICE Agent.
   // A copy of the |candidate| will be created and added to the remote
   // description. So the caller of this method still has the ownership of the