Revert "content: Remove use of MessageLoopProxy and deprecated MessageLoop APIs"

content/browser/fileapi/copy_or_move_file_validator_unittest.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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/files/scoped_temp_dir.h"
-#include "base/location.h"
 #include "base/run_loop.h"
-#include "base/single_thread_task_runner.h"
-#include "base/thread_task_runner_handle.h"
 #include "content/public/test/async_file_test_helper.h"
 #include "content/public/test/mock_special_storage_policy.h"
 #include "content/public/test/test_file_system_backend.h"
 #include "content/public/test/test_file_system_context.h"
 #include "storage/browser/blob/shareable_file_reference.h"
 #include "storage/browser/fileapi/copy_or_move_file_validator.h"
 #include "storage/browser/fileapi/external_mount_points.h"
 #include "storage/browser/fileapi/file_system_backend.h"
 #include "storage/browser/fileapi/file_system_context.h"
 #include "storage/browser/fileapi/file_system_url.h"
@@ skipping 194 matching lines @@
                   base::File::FILE_ERROR_SECURITY),
           write_result_(validity == VALID || validity == PRE_WRITE_INVALID ?
                         base::File::FILE_OK :
                         base::File::FILE_ERROR_SECURITY) {
     }
     ~TestCopyOrMoveFileValidator() override {}
 
     void StartPreWriteValidation(
         const ResultCallback& result_callback) override {
       // Post the result since a real validator must do work asynchronously.
-      base::ThreadTaskRunnerHandle::Get()->PostTask(
+      base::MessageLoop::current()->PostTask(
           FROM_HERE, base::Bind(result_callback, result_));
     }
 
     void StartPostWriteValidation(
         const base::FilePath& dest_platform_path,
         const ResultCallback& result_callback) override {
       // Post the result since a real validator must do work asynchronously.
-      base::ThreadTaskRunnerHandle::Get()->PostTask(
+      base::MessageLoop::current()->PostTask(
           FROM_HERE, base::Bind(result_callback, write_result_));
     }
 
    private:
     base::File::Error result_;
     base::File::Error write_result_;
 
     DISALLOW_COPY_AND_ASSIGN(TestCopyOrMoveFileValidator);
   };
 
@@ skipping 77 matching lines @@
   helper.SetUp();
   scoped_ptr<CopyOrMoveFileValidatorFactory> factory(
       new TestCopyOrMoveFileValidatorFactory(POST_WRITE_INVALID));
   helper.SetMediaCopyOrMoveFileValidatorFactory(factory.Pass());
 
   helper.CopyTest(base::File::FILE_ERROR_SECURITY);
   helper.MoveTest(base::File::FILE_ERROR_SECURITY);
 }
 
 }  // namespace content