[WIP] Provided file system from NACL.

chrome/browser/chromeos/file_system_provider/operations/read_file.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/chromeos/file_system_provider/operations/read_file.h"
 
 #include <limits>
 #include <string>
 
 #include "base/stl_util.h"
@@ skipping 26 matching lines @@
     return -1;
 
   memcpy(buffer->data() + buffer_offset, vector_as_array(&params->data),
          chunk_size);
 
   return chunk_size;
 }
 
 }  // namespace
 
-ReadFile::ReadFile(
-    extensions::EventRouter* event_router,
+template <class DestinationPolicy>
+ReadFile<DestinationPolicy>::ReadFile(
+    typename DestinationPolicy::EventRouterType* event_router,
     const ProvidedFileSystemInfo& file_system_info,
     int file_handle,
     scoped_refptr<net::IOBuffer> buffer,
     int64 offset,
     int length,
     const ProvidedFileSystemInterface::ReadChunkReceivedCallback& callback)
-    : Operation(event_router, file_system_info),
+    : Operation<DestinationPolicy>(event_router, file_system_info),
       file_handle_(file_handle),
       buffer_(buffer),
       offset_(offset),
       length_(length),
       current_offset_(0),
       callback_(callback) {
 }
 
-ReadFile::~ReadFile() {
+template <class DestinationPolicy>
+ReadFile<DestinationPolicy>::~ReadFile() {
 }
 
-bool ReadFile::Execute(int request_id) {
+template <class DestinationPolicy>
+bool ReadFile<DestinationPolicy>::Execute(int request_id) {
   using extensions::api::file_system_provider::ReadFileRequestedOptions;
   TRACE_EVENT0("file_system_provider", "ReadFile::Execute");
 
   ReadFileRequestedOptions options;
-  options.file_system_id = file_system_info_.file_system_id();
+  options.file_system_id = this->file_system_info_.file_system_id();
   options.request_id = request_id;
   options.open_request_id = file_handle_;
   options.offset = offset_;
   options.length = length_;
 
-  return SendEvent(
+  return this->SendEvent(
       request_id,
       extensions::api::file_system_provider::OnReadFileRequested::kEventName,
       extensions::api::file_system_provider::OnReadFileRequested::Create(
           options));
 }
 
-void ReadFile::OnSuccess(int /* request_id */,
-                         scoped_ptr<RequestValue> result,
-                         bool has_more) {
+template <class DestinationPolicy>
+void ReadFile<DestinationPolicy>::OnSuccess(int /* request_id */,
+                                 scoped_ptr<RequestValue> result,
+                                 bool has_more) {
   TRACE_EVENT0("file_system_provider", "ReadFile::OnSuccess");
   const int copy_result = CopyRequestValueToBuffer(
       result.Pass(), buffer_, current_offset_, length_);
 
   if (copy_result < 0) {
     LOG(ERROR) << "Failed to parse a response for the read file operation.";
     callback_.Run(
         0 /* chunk_length */, false /* has_more */, base::File::FILE_ERROR_IO);
     return;
   }
 
   if (copy_result > 0)
     current_offset_ += copy_result;
   callback_.Run(copy_result, has_more, base::File::FILE_OK);
 }
 
-void ReadFile::OnError(int /* request_id */,
-                       scoped_ptr<RequestValue> /* result */,
-                       base::File::Error error) {
+template <class DestinationPolicy>
+void ReadFile<DestinationPolicy>::OnError(int /* request_id */,
+                               scoped_ptr<RequestValue> /* result */,
+                               base::File::Error error) {
   TRACE_EVENT0("file_system_provider", "ReadFile::OnError");
   callback_.Run(0 /* chunk_length */, false /* has_more */, error);
 }
 
+FOR_EACH_DESTINATION_SPECIALIZE(ReadFile)
+
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos