content: Cleanup class/struct forward declarations

content/browser/frame_host/navigator_impl.h

 // Copyright 2013 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 CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_IMPL_H_
 
 #include <memory>
 
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
 #include "content/browser/frame_host/navigation_controller_impl.h"
 #include "content/browser/frame_host/navigator.h"
 #include "content/common/content_export.h"
 #include "content/common/navigation_params.h"
 #include "url/gurl.h"
 
 class GURL;
 
 namespace content {
 
 class NavigationControllerImpl;
 class NavigatorDelegate;
-class NavigatorTest;
 class ResourceRequestBodyImpl;
 struct LoadCommittedDetails;
 
 // This class is an implementation of Navigator, responsible for managing
 // navigations in regular browser tabs.
 class CONTENT_EXPORT NavigatorImpl : public Navigator {
  public:
   NavigatorImpl(NavigationControllerImpl* navigation_controller,
                 NavigatorDelegate* delegate);
 
@@ skipping 120 matching lines @@
   NavigatorDelegate* delegate_;
 
   std::unique_ptr<NavigatorImpl::NavigationMetricsData> navigation_data_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigatorImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATOR_IMPL_H_