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

chrome/browser/chromeos/drive/file_system/truncate_operation.cc

 // Copyright 2013 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/file_system/truncate_operation.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
-#include "base/message_loop/message_loop_proxy.h"
 #include "base/sequenced_task_runner.h"
 #include "base/task_runner_util.h"
+#include "base/thread_task_runner_handle.h"
 #include "chrome/browser/chromeos/drive/drive.pb.h"
 #include "chrome/browser/chromeos/drive/file_cache.h"
 #include "chrome/browser/chromeos/drive/file_errors.h"
 #include "chrome/browser/chromeos/drive/file_system/download_operation.h"
 #include "chrome/browser/chromeos/drive/file_system/operation_delegate.h"
 #include "chrome/browser/chromeos/drive/job_scheduler.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserThread;
 
@@ skipping 52 matching lines @@
 TruncateOperation::~TruncateOperation() {
 }
 
 void TruncateOperation::Truncate(const base::FilePath& file_path,
                                  int64 length,
                                  const FileOperationCallback& callback) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   DCHECK(!callback.is_null());
 
   if (length < 0) {
-    base::MessageLoopProxy::current()->PostTask(
+    base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE,
         base::Bind(callback, FILE_ERROR_INVALID_OPERATION));
     return;
   }
 
   // TODO(kinaba): http://crbug.com/132780.
   // Optimize the cases for small |length|, at least for |length| == 0.
   download_operation_->EnsureFileDownloadedByPath(
       file_path,
       ClientContext(USER_INITIATED),
@@ skipping 41 matching lines @@
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   DCHECK(!callback.is_null());
 
   delegate_->OnEntryUpdatedByOperation(ClientContext(USER_INITIATED), local_id);
 
   callback.Run(error);
 }
 
 }  // namespace file_system
 }  // namespace drive