[update_engine] Update to use not-hideously-old logging API from chrome

file_writer.h

 // Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROMEOS_PLATFORM_UPDATE_ENGINE_FILE_WRITER_H__
 #define CHROMEOS_PLATFORM_UPDATE_ENGINE_FILE_WRITER_H__
 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>
-#include "chromeos/obsolete_logging.h"
+#include "base/logging.h"
 #include "update_engine/utils.h"
 
 // FileWriter is a class that is used to (synchronously, for now) write to
 // a file. This file is a thin wrapper around open/write/close system calls,
 // but provides and interface that can be customized by subclasses that wish
 // to filter the data.
 
 namespace chromeos_update_engine {
 
 class FileWriter {
@@ skipping 46 matching lines @@
   }
  private:
   FileWriter* writer_;
   
   DISALLOW_COPY_AND_ASSIGN(ScopedFileWriterCloser);
 };
 
 }  // namespace chromeos_update_engine
 
 #endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_FILE_WRITER_H__