Update WebKit idl files after chrome roll

third_party/WebCore/Modules/mediastream/RTCPeerConnection.idl

Index: third_party/WebCore/Modules/mediastream/RTCPeerConnection.idl
diff --git a/third_party/WebCore/Modules/mediastream/RTCPeerConnection.idl b/third_party/WebCore/Modules/mediastream/RTCPeerConnection.idl
index 9cf0b6461ca6059e9f56e874889b90f648f0a68b..0553b8920e04d7fdf089d8b3d169d901a1e82774 100644
--- a/third_party/WebCore/Modules/mediastream/RTCPeerConnection.idl
+++ b/third_party/WebCore/Modules/mediastream/RTCPeerConnection.idl
@@ -66,8 +66,8 @@
     readonly attribute DOMString iceGatheringState;
     readonly attribute DOMString iceConnectionState;
 
-    readonly attribute MediaStreamList localStreams;
-    readonly attribute MediaStreamList remoteStreams;
+    sequence<MediaStream> getLocalStreams();
+    sequence<MediaStream> getRemoteStreams();
 
     [StrictTypeChecking] void addStream(in MediaStream stream, in [Optional] Dictionary mediaConstraints)
         raises(DOMException);
@@ -79,6 +79,9 @@
     RTCDataChannel createDataChannel(in [TreatNullAs=NullString, TreatUndefinedAs=NullString] DOMString label, in [Optional] Dictionary options)
          raises(DOMException);
 
+    RTCDTMFSender createDTMFSender(in MediaStreamTrack track)
+         raises(DOMException);
+
     void close()
         raises(DOMException);