Do PPB_FileIO Query and Read in the plugin process.

ppapi/proxy/file_io_resource.h

Index: ppapi/proxy/file_io_resource.h
diff --git a/ppapi/proxy/file_io_resource.h b/ppapi/proxy/file_io_resource.h
index a2b928dcd840b81958ffab3bbb32ac3435c97b92..44eb8fec5aef424499eb65c9c9c4f86780815e11 100644
--- a/ppapi/proxy/file_io_resource.h
+++ b/ppapi/proxy/file_io_resource.h
@@ -71,26 +71,30 @@ class PPAPI_PROXY_EXPORT FileIOResource
                         int32_t bytes_to_read,
                         const PP_ArrayOutput& array_output,
                         scoped_refptr<TrackedCallback> callback);
+  void CloseFileHandle();
 
-  // Handlers of reply messages. Note that all of them have a callback
-  // parameters bound when call to the host.
+  // Reply message handlers for operations that are done in the host.
   void OnPluginMsgGeneralComplete(scoped_refptr<TrackedCallback> callback,
                                   const ResourceMessageReplyParams& params);
   void OnPluginMsgOpenFileComplete(scoped_refptr<TrackedCallback> callback,
                                    const ResourceMessageReplyParams& params);
-  void OnPluginMsgQueryComplete(scoped_refptr<TrackedCallback> callback,
-                                PP_FileInfo* output_info_,
-                                const ResourceMessageReplyParams& params,
-                                const PP_FileInfo& info);
-  void OnPluginMsgReadComplete(scoped_refptr<TrackedCallback> callback,
-                               PP_ArrayOutput array_output,
-                               const ResourceMessageReplyParams& params,
-                               const std::string& data);
   void OnPluginMsgRequestOSFileHandleComplete(
       scoped_refptr<TrackedCallback> callback,
       PP_FileHandle* output_handle,
       const ResourceMessageReplyParams& params);
 
+  // Reply message handlers for operations that are done in the plugin.
+  void OnQueryComplete(scoped_refptr<TrackedCallback> callback,
+                       PP_FileInfo* output_info,
+                       base::PlatformFileError error_code,
+                       const base::PlatformFileInfo& file_info);
+  void OnReadComplete(scoped_refptr<TrackedCallback> callback,
+                      PP_ArrayOutput array_output,
+                      base::PlatformFileError error_code,
+                      const char* data, int bytes_read);
+
+  PP_FileHandle file_handle_;
+  PP_FileSystemType file_system_type_;
   FileIOStateManager state_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(FileIOResource);