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

chrome/browser/chromeos/dbus/cros_dbus_service.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_CROS_DBUS_SERVICE_H_
 #define CHROME_BROWSER_CHROMEOS_DBUS_CROS_DBUS_SERVICE_H_
 #pragma once
 
 #include <vector>
 
@@ skipping 12 matching lines @@
 // OS. The service will be registered as follows:
 //
 // Service name: org.chromium.LibCrosService (kLibCrosServiceName)
 // Object path: chromium/LibCrosService (kLibCrosServicePath)
 //
 // For historical reasons, the rather irrelevant name "LibCrosService" is
 // used in the D-Bus constants such as the service name.
 //
 // CrosDBusService exports D-Bus methods through service provider classes
 // that implement CrosDBusService::ServiceProviderInterface.
-//
-class ProxyResolutionService;
 
 class CrosDBusService {
  public:
   // CrosDBusService consists of service providers that implement this
   // interface.
   class ServiceProviderInterface {
    public:
     // Starts the service provider. |exported_object| is used to export
     // D-Bus methods.
     virtual void Start(
@@ skipping 15 matching lines @@
   // |proxy_resolution_service|.
   friend class CrosDBusServiceTest;
   static CrosDBusService* CreateForTesting(
       dbus::Bus* bus,
       ServiceProviderInterface* proxy_resolution_service);
 };
 
 }  // namespace
 
 #endif  // CHROME_BROWSER_CHROMEOS_DBUS_CROS_DBUS_SERVICE_H_