Enable fire-and-forget Destroy of HW video decoder, and misc other improvements.

webkit/plugins/ppapi/plugin_delegate.h

 // Copyright (c) 2011 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 WEBKIT_PLUGINS_PPAPI_PLUGIN_DELEGATE_H_
 #define WEBKIT_PLUGINS_PPAPI_PLUGIN_DELEGATE_H_
 
 #include <string>
 
 #include "base/callback_old.h"
@@ skipping 198 matching lines @@
     // destructed.
     virtual void ShutDown() = 0;
 
    protected:
     virtual ~PlatformAudio() {}
   };
 
   // Interface for PlatformVideoDecoder is directly inherited from general media
   // VideoDecodeAccelerator interface.
   class PlatformVideoDecoder : public media::VideoDecodeAccelerator {
-   public:
+   protected:
     virtual ~PlatformVideoDecoder() {}
   };
 
   // Provides access to the ppapi broker.
   class PpapiBroker {
    public:
     virtual void Connect(webkit::ppapi::PPB_Broker_Impl* client) = 0;
 
     // Decrements the references to the broker.
     // When there are no more references, this renderer's dispatcher is
@@ skipping 184 matching lines @@
   virtual base::SharedMemory* CreateAnonymousSharedMemory(uint32_t size) = 0;
 
   // Returns the current preferences.
   virtual ::ppapi::Preferences GetPreferences() = 0;
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PLUGIN_DELEGATE_H_