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

chrome/browser/chromeos/drive/fileapi/async_file_util.cc

Index: chrome/browser/chromeos/drive/fileapi/async_file_util.cc
diff --git a/chrome/browser/chromeos/drive/fileapi/async_file_util.cc b/chrome/browser/chromeos/drive/fileapi/async_file_util.cc
index 904d601b25cc081ccf9efa5378bceaeb58342c11..2c63ad44f5a77534c240a4303de7dc452cc4ab45 100644
--- a/chrome/browser/chromeos/drive/fileapi/async_file_util.cc
+++ b/chrome/browser/chromeos/drive/fileapi/async_file_util.cc
@@ -7,6 +7,8 @@
 #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"
@@ -51,15 +53,13 @@ void PostFileSystemCallback(
   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|.