GTTF: Add missing virtual destructors.

content/public/browser/webrtc_internals.h

 // Copyright (c) 2013 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_PUBLIC_BROWSER_WEBRTC_INTERNALS_H_
 #define CONTENT_PUBLIC_BROWSER_WEBRTC_INTERNALS_H_
 
 #include "base/process.h"
 
 namespace content {
@@ skipping 16 matching lines @@
   // |pid| is the renderer process id, |lid| is the renderer local id.
   virtual void RemovePeerConnection(base::ProcessId pid, int lid) = 0;
 
   // This method is called when a PeerConnection is updated.
   // |pid| is the renderer process id, |lid| is the renderer local id,
   // |type| is the update type, |value| is the detail of the update.
   virtual void UpdatePeerConnection(base::ProcessId pid,
                                     int lid,
                                     const std::string& type,
                                     const std::string& value) = 0;
+
+ protected:
+  virtual ~WebRTCInternals() { }
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEBRTC_INTERNALSH_