Implement a proxy for Pepper FileIO.

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 13 matching lines @@
 
 class SerializedVarReturnValue;
 
 class PPB_FileRef_Proxy : public InterfaceProxy {
  public:
   explicit PPB_FileRef_Proxy(Dispatcher* dispatcher);
   virtual ~PPB_FileRef_Proxy();
 
   static PP_Resource CreateProxyResource(PP_Resource file_system,
                                          const char* path);
+  static PP_Resource CreateProxyResource(
+      const PPB_FileRef_CreateInfo& serialized);
 
   // 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.
   //
   // Various PPAPI functions return file refs from various interfaces, so this
   // function is public so anybody can send a file ref.
   void SerializeFileRef(PP_Resource file_ref,
                         PPB_FileRef_CreateInfo* result);
 
   // Creates a plugin resource from the given CreateInfo sent from the host.
   // The value will be the result of calling SerializeFileRef on the host.
   // This represents passing the resource ownership to the plugin. This
   // function also checks the validity of the result and returns 0 on failure.
   //
   // Various PPAPI functions return file refs from various interfaces, so this
   // function is public so anybody can receive a file ref.
   static PP_Resource DeserializeFileRef(
       const PPB_FileRef_CreateInfo& serialized);
 
   static const ApiID kApiID = API_ID_PPB_FILE_REF;
 
  private:
-  // Message handlers.
+  // Plugin -> host message handlers.
   void OnMsgCreate(const HostResource& file_system,
                    const std::string& path,
                    PPB_FileRef_CreateInfo* result);
   void OnMsgGetParent(const HostResource& host_resource,
                       PPB_FileRef_CreateInfo* result);
   void OnMsgMakeDirectory(const HostResource& host_resource,
                           PP_Bool make_ancestors,
                           int callback_id);
   void OnMsgTouch(const HostResource& host_resource,
                   PP_Time last_access,
@@ skipping 19 matching lines @@
   pp::CompletionCallbackFactory<PPB_FileRef_Proxy,
                                 ProxyNonThreadSafeRefCount> callback_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_FileRef_Proxy);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_PPB_FILE_REF_PROXY_H_