[Extensions] Convert APIs to use movable types [5]

chrome/browser/chromeos/file_system_provider/operations/read_directory.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_directory.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <utility>
 
-#include "base/memory/linked_ptr.h"
 #include "chrome/browser/chromeos/file_system_provider/operations/get_metadata.h"
 #include "chrome/common/extensions/api/file_system_provider.h"
 #include "chrome/common/extensions/api/file_system_provider_internal.h"
 
 namespace chromeos {
 namespace file_system_provider {
 namespace operations {
 namespace {
 
 // Convert |input| into |output|. If parsing fails, then returns false.
 bool ConvertRequestValueToEntryList(scoped_ptr<RequestValue> value,
                                     storage::AsyncFileUtil::EntryList* output) {
   using extensions::api::file_system_provider::EntryMetadata;
   using extensions::api::file_system_provider_internal::
       ReadDirectoryRequestedSuccess::Params;
 
   const Params* params = value->read_directory_success_params();
   if (!params)
     return false;
 
-  for (size_t i = 0; i < params->entries.size(); ++i) {
-    const linked_ptr<EntryMetadata> entry_metadata = params->entries[i];
+  for (const EntryMetadata& entry_metadata : params->entries) {
     if (!ValidateIDLEntryMetadata(
-            *entry_metadata,
+            entry_metadata,
             ProvidedFileSystemInterface::METADATA_FIELD_IS_DIRECTORY |
                 ProvidedFileSystemInterface::METADATA_FIELD_NAME,
             false /* root_entry */)) {
       return false;
     }
 
     storage::DirectoryEntry output_entry;
-    output_entry.is_directory = *entry_metadata->is_directory;
-    output_entry.name = *entry_metadata->name;
+    output_entry.is_directory = *entry_metadata.is_directory;
+    output_entry.name = *entry_metadata.name;
 
     output->push_back(output_entry);
   }
 
   return true;
 }
 
 }  // namespace
 
 ReadDirectory::ReadDirectory(
@@ skipping 52 matching lines @@
 void ReadDirectory::OnError(int /* request_id */,
                             scoped_ptr<RequestValue> /* result */,
                             base::File::Error error) {
   callback_.Run(
       error, storage::AsyncFileUtil::EntryList(), false /* has_more */);
 }
 
 }  // namespace operations
 }  // namespace file_system_provider
 }  // namespace chromeos