Revert 87415 - Convert more interfaces to the new thunk system. This goes up to and including

ppapi/proxy/ppb_file_ref_proxy.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 PPAPI_PROXY_PPB_FILE_REF_PROXY_H_
 #define PPAPI_PROXY_PPB_FILE_REF_PROXY_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 10 matching lines @@
 class HostResource;
 struct PPBFileRef_CreateInfo;
 
 class PPB_FileRef_Proxy : public InterfaceProxy {
  public:
   PPB_FileRef_Proxy(Dispatcher* dispatcher, const void* target_interface);
   virtual ~PPB_FileRef_Proxy();
 
   static const Info* GetInfo();
 
-  static PP_Resource CreateProxyResource(PP_Resource file_system,
-                                         const char* path);
+  const PPB_FileRef_Dev* ppb_file_ref_target() const {
+    return static_cast<const PPB_FileRef_Dev*>(target_interface());
+  }
 
   // InterfaceProxy implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg);
 
   // Takes a resource in the host and converts it into a serialized file ref
   // "create info" for reconstitution in the plugin. This struct contains all
   // the necessary information about the file ref.
   //
   // This function is not static because it needs access to the particular
   // dispatcher and host interface.
@@ skipping 33 matching lines @@
                    const HostResource& new_file_ref,
                    uint32_t serialized_callback);
 
   DISALLOW_COPY_AND_ASSIGN(PPB_FileRef_Proxy);
 };
 
 }  // namespace proxy
 }  // namespace pp
 
 #endif  // PPAPI_PROXY_PPB_FILE_REF_PROXY_H_