[chrome/browser/chromeos/drive] Avoid use of MessageLoopProxy by use of TTRH

chrome/browser/chromeos/drive/fileapi/async_file_util.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/drive/fileapi/async_file_util.h"
 
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
+#include "base/single_thread_task_runner.h"
+#include "base/thread_task_runner_handle.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/chromeos/drive/drive_integration_service.h"
 #include "chrome/browser/chromeos/drive/file_system_util.h"
 #include "chrome/browser/chromeos/drive/fileapi/fileapi_worker.h"
 #include "content/public/browser/browser_thread.h"
 #include "google_apis/drive/task_util.h"
 #include "storage/browser/blob/shareable_file_reference.h"
 #include "storage/browser/fileapi/file_system_operation_context.h"
 #include "storage/browser/fileapi/file_system_url.h"
 
@@ skipping 24 matching lines @@
 // Posts fileapi_internal::RunFileSystemCallback to UI thread.
 // This function must be called on IO thread.
 // The |on_error_callback| will be called (on error case) on IO thread.
 void PostFileSystemCallback(
     const fileapi_internal::FileSystemGetter& file_system_getter,
     const base::Callback<void(FileSystemInterface*)>& function,
     const base::Closure& on_error_callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   BrowserThread::PostTask(
-      BrowserThread::UI,
-      FROM_HERE,
-      base::Bind(&fileapi_internal::RunFileSystemCallback,
-                 file_system_getter, function,
-                 on_error_callback.is_null() ?
-                 base::Closure() :
-                 base::Bind(&google_apis::RunTaskWithTaskRunner,
-                            base::MessageLoopProxy::current(),
-                            on_error_callback)));
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&fileapi_internal::RunFileSystemCallback, file_system_getter,
+                 function, on_error_callback.is_null()
+                               ? base::Closure()
+                               : base::Bind(&google_apis::RunTaskWithTaskRunner,
+                                            base::ThreadTaskRunnerHandle::Get(),
+                                            on_error_callback)));
 }
 
 // Runs CreateOrOpenFile callback based on the given |error| and |file|.
 void RunCreateOrOpenFileCallback(
     const AsyncFileUtil::CreateOrOpenCallback& callback,
     base::File file,
     const base::Closure& close_callback_on_ui_thread) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   // It is necessary to make a closure, which runs on file closing here.
@@ skipping 368 matching lines @@
                      base::Bind(&RunCreateSnapshotFileCallback, callback))),
       base::Bind(callback,
                  base::File::FILE_ERROR_FAILED,
                  base::File::Info(),
                  base::FilePath(),
                  scoped_refptr<storage::ShareableFileReference>()));
 }
 
 }  // namespace internal
 }  // namespace drive