Add a new GetNegotiatedProtocol method to StreamSocket and implement in all subclasses.

remoting/protocol/pepper_transport_socket_adapter.h

Index: remoting/protocol/pepper_transport_socket_adapter.h
diff --git a/remoting/protocol/pepper_transport_socket_adapter.h b/remoting/protocol/pepper_transport_socket_adapter.h
index 5888268253347d1a07810556af7efe5db6546de9..ef1945819e1848e1d4d44b0c197a2a26654a592c 100644
--- a/remoting/protocol/pepper_transport_socket_adapter.h
+++ b/remoting/protocol/pepper_transport_socket_adapter.h
@@ -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.
 
@@ -70,6 +70,7 @@ class PepperTransportSocketAdapter : public base::NonThreadSafe,
   virtual bool UsingTCPFastOpen() const OVERRIDE;
   virtual int64 NumBytesRead() const OVERRIDE;
   virtual base::TimeDelta GetConnectTimeMicros() const OVERRIDE;
+  virtual net::NextProto GetNegotiatedProtocol() const OVERRIDE;
 
  private:
   // Callbacks for PPAPI calls.