content: Cleanup class/struct forward declarations

content/browser/loader/navigation_url_loader.h

 // Copyright 2014 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_LOADER_NAVIGATION_URL_LOADER_H_
 #define CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "content/common/content_export.h"
 
 namespace content {
 
 class BrowserContext;
 class NavigationUIData;
 class NavigationURLLoaderDelegate;
 class NavigationURLLoaderFactory;
 class ServiceWorkerNavigationHandle;
-struct CommonNavigationParams;
 struct NavigationRequestInfo;
 
 // PlzNavigate: The navigation logic's UI thread entry point into the resource
 // loading stack. It exposes an interface to control the request prior to
 // receiving the response. If the NavigationURLLoader is destroyed before
 // OnResponseStarted is called, the request is aborted.
 class CONTENT_EXPORT NavigationURLLoader {
  public:
   // Creates a NavigationURLLoader. The caller is responsible for ensuring that
   // |delegate| outlives the loader. |request_body| must not be accessed on the
@@ skipping 25 matching lines @@
  protected:
   NavigationURLLoader() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(NavigationURLLoader);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_NAVIGATION_URL_LOADER_H_