Cleanup: Remove unneeded forward declarations from chrome/browser/chromeos.

chrome/browser/chromeos/dbus/power_manager_client.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_DBUS_POWER_MANAGER_CLIENT_H_
 #define CHROME_BROWSER_CHROMEOS_DBUS_POWER_MANAGER_CLIENT_H_
 
-#include "base/memory/ref_counted.h"
-#include "base/observer_list.h"
+#include <string>
 
-#include <string>
+#include "base/basictypes.h"
 
 namespace dbus {
 class Bus;
-class ObjectProxy;
-class Response;
-class Signal;
 }  // namespace
 
 namespace chromeos {
 
 // This is the local struct that is used in Chrome.
 struct PowerSupplyStatus {
   bool line_power_on;
 
   bool battery_is_present;
   bool battery_is_full;
@@ skipping 53 matching lines @@
   // Create() should be used instead.
   PowerManagerClient();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PowerManagerClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_DBUS_POWER_MANAGER_CLIENT_H_