Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/utility/image_writer/image_writer_unittest.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 "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/run_loop.h"
 #include "chrome/utility/image_writer/error_messages.h"
 #include "chrome/utility/image_writer/image_writer.h"
 #include "chrome/utility/image_writer/image_writer_handler.h"
@@ skipping 20 matching lines @@
     ASSERT_TRUE(
         base::CreateTemporaryFileInDir(temp_dir_.path(), &device_path_));
   }
 
   virtual void TearDown() OVERRIDE {}
 
   void FillFile(const base::FilePath& path, int pattern) {
     scoped_ptr<char[]> buffer(new char[kTestFileSize]);
     memset(buffer.get(), pattern, kTestFileSize);
 
-    ASSERT_TRUE(file_util::WriteFile(path, buffer.get(), kTestFileSize));
+    ASSERT_TRUE(base::WriteFile(path, buffer.get(), kTestFileSize));
   }
 
   void FillDefault(const base::FilePath& path) { FillFile(path, kTestPattern); }
 
   base::FilePath image_path_;
   base::FilePath device_path_;
 
  private:
   base::MessageLoop message_loop_;
   base::ScopedTempDir temp_dir_;
@@ skipping 138 matching lines @@
   image_writer.Write(image_path_, device_path_);
 
   base::RunLoop().RunUntilIdle();
 
   image_writer.Verify(image_path_, device_path_);
 
   base::RunLoop().RunUntilIdle();
 }
 
 }  // namespace image_writer