chrome: Cleanup class/struct forward declarations

chrome/browser/browsing_data/browsing_data_service_worker_helper.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 CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_SERVICE_WORKER_HELPER_H_
 #define CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_SERVICE_WORKER_HELPER_H_
 
 #include <stddef.h>
 
 #include <list>
 #include <set>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/public/browser/service_worker_context.h"
 #include "content/public/browser/service_worker_usage_info.h"
 #include "url/gurl.h"
 
-class Profile;
-
 // BrowsingDataServiceWorkerHelper is an interface for classes dealing with
 // aggregating and deleting browsing data stored for Service Workers -
 // registrations, scripts, and caches.
 // A client of this class need to call StartFetching from the UI thread to
 // initiate the flow, and it'll be notified by the callback in its UI thread at
 // some later point.
 class BrowsingDataServiceWorkerHelper
     : public base::RefCountedThreadSafe<BrowsingDataServiceWorkerHelper> {
  public:
   using FetchCallback =
@@ skipping 74 matching lines @@
 
  private:
   ~CannedBrowsingDataServiceWorkerHelper() override;
 
   std::set<PendingServiceWorkerUsageInfo> pending_service_worker_info_;
 
   DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataServiceWorkerHelper);
 };
 
 #endif  // CHROME_BROWSER_BROWSING_DATA_BROWSING_DATA_SERVICE_WORKER_HELPER_H_