components: Cleanup class/struct fwd declarations

components/navigation_interception/intercept_navigation_throttle.h

 // Copyright 2015 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 COMPONENTS_NAVIGATION_INTERCEPTION_INTERCEPT_NAVIGATION_THROTTLE_H_
 #define COMPONENTS_NAVIGATION_INTERCEPTION_INTERCEPT_NAVIGATION_THROTTLE_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "content/public/browser/navigation_throttle.h"
 
-class GURL;
-
 namespace content {
 class NavigationHandle;
 class WebContents;
 }
 
 namespace navigation_interception {
 
 class NavigationParams;
 
 // This class allows the provider of the Callback to selectively ignore top
@@ skipping 31 matching lines @@
   const bool run_callback_synchronously_;
 
   base::WeakPtrFactory<InterceptNavigationThrottle> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InterceptNavigationThrottle);
 };
 
 }  // namespace navigation_interception
 
 #endif  // COMPONENTS_NAVIGATION_INTERCEPTION_INTERCEPT_NAVIGATION_THROTTLE_H_