Roll libjingle to r124 and roll webrtc to 1888.

remoting/protocol/content_description.h

Index: remoting/protocol/content_description.h
===================================================================
--- remoting/protocol/content_description.h	(revision 126778)
+++ remoting/protocol/content_description.h	(working copy)
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -32,6 +32,8 @@
                      scoped_ptr<buzz::XmlElement> authenticator_message);
   virtual ~ContentDescription();
 
+  virtual ContentDescription* Copy() const OVERRIDE;
+
   const CandidateSessionConfig* config() const {
     return candidate_config_.get();
   }