Add the "virtual" keyword on method overrides that are missing it.

ppapi/shared_impl/audio_impl.h

 // Copyright (c) 2010 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 PPAPI_SHARED_IMPL_AUDIO_IMPL_H_
 #define PPAPI_SHARED_IMPL_AUDIO_IMPL_H_
 
 #include "base/scoped_ptr.h"
 #include "base/simple_thread.h"
 #include "base/shared_memory.h"
@@ skipping 34 matching lines @@
   // playback if we're currently set to play.
   void SetStreamInfo(base::SharedMemoryHandle shared_memory_handle,
                      size_t shared_memory_size,
                      base::SyncSocket::Handle socket_handle);
 
  private:
   // Starts execution of the audio thread.
   void StartThread();
 
   // DelegateSimpleThread::Delegate implementation. Run on the audio thread.
-  void Run();
+  virtual void Run();
 
   // True if playing the stream.
   bool playing_;
 
   // Socket used to notify us when audio is ready to accept new samples. This
   // pointer is created in StreamCreated().
   scoped_ptr<base::SyncSocket> socket_;
 
   // Sample buffer in shared memory. This pointer is created in
   // StreamCreated(). The memory is only mapped when the audio thread is
@@ skipping 10 matching lines @@
   PPB_Audio_Callback callback_;
 
   // User data pointer passed verbatim to the callback function.
   void* user_data_;
 };
 
 }  // namespace shared_impl
 }  // namespace pp
 
 #endif  // PPAPI_SHARED_IMPL_AUDIO_IMPL_H_