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

extent_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_EXTENT_WRITER_H__
 #define CHROMEOS_PLATFORM_UPDATE_ENGINE_EXTENT_WRITER_H__
 
 #include <vector>
-#include "chromeos/obsolete_logging.h"
+#include "base/logging.h"
 #include "update_engine/update_metadata.pb.h"
 #include "update_engine/utils.h"
 
 // ExtentWriter is an abstract class which synchronously writes to a given
 // file descriptor at the extents given.
 
 namespace chromeos_update_engine {
 
 class ExtentWriter {
  public:
@@ skipping 92 matching lines @@
 
  private:
   ExtentWriter* underlying_extent_writer_;  // The underlying ExtentWriter.
   size_t block_size_;
   size_t bytes_written_mod_block_size_;
 };
 
 }  // namespace chromeos_update_engine
 
 #endif  // CHROMEOS_PLATFORM_UPDATE_ENGINE_EXTENT_WRITER_H__