Remove all uses of the global Dispatcher Get function.

ppapi/proxy/ppb_buffer_proxy.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_PPB_BUFFER_PROXY_H_
 #define PPAPI_PPB_BUFFER_PROXY_H_
 
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/proxy/interface_proxy.h"
 
 struct PPB_Buffer_Dev;
 
 namespace pp {
 namespace proxy {
 
 class HostResource;
 
 class PPB_Buffer_Proxy : public InterfaceProxy {
  public:
   PPB_Buffer_Proxy(Dispatcher* dispatcher, const void* target_interface);
   virtual ~PPB_Buffer_Proxy();
 
+  static const Info* GetInfo();
+
   const PPB_Buffer_Dev* ppb_buffer_target() const {
     return static_cast<const PPB_Buffer_Dev*>(target_interface());
   }
 
   // InterfaceProxy implementation.
-  virtual const void* GetSourceInterface() const;
-  virtual InterfaceID GetInterfaceId() const;
   virtual bool OnMessageReceived(const IPC::Message& msg);
 
  private:
   // Message handlers.
   void OnMsgCreate(PP_Instance instance,
                    uint32_t size,
                    HostResource* result_resource,
                    int* result_shm_handle);
 };
 
 }  // namespace proxy
 }  // namespace pp
 
 #endif  // PPAPI_PPB_BUFFER_PROXY_H_