Remove duplicate includes from chromeos/

chromeos/dbus/update_engine_client.cc

 // Copyright (c) 2012 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 "chromeos/dbus/update_engine_client.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
-#include "base/callback.h"
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_util.h"
 #include "chromeos/chromeos_switches.h"
 #include "dbus/bus.h"
 #include "dbus/message.h"
 #include "dbus/object_path.h"
 #include "dbus/object_proxy.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
@@ skipping 545 matching lines @@
   auto cix = std::find(kReleaseChannelsList,
                        kReleaseChannelsList + arraysize(kReleaseChannelsList),
                        current_channel);
   auto tix = std::find(kReleaseChannelsList,
                        kReleaseChannelsList + arraysize(kReleaseChannelsList),
                        target_channel);
   return tix > cix;
 }
 
 }  // namespace chromeos