chrome: Cleanup class/struct forward declarations

chrome/browser/browser_process.h

 // Copyright (c) 2012 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.
 
 // This interface is for managing the global services of the application. Each
 // service is lazily created when requested the first time. The service getters
 // will return NULL if the service is not available, so callers must check for
 // this condition.
 
 #ifndef CHROME_BROWSER_BROWSER_PROCESS_H_
@@ skipping 15 matching lines @@
 class DownloadRequestLimiter;
 class DownloadStatusUpdater;
 class GpuModeManager;
 class GpuProfileCache;
 class IconManager;
 class IntranetRedirectDetector;
 class IOThread;
 class MediaFileSystemRegistry;
 class NotificationPlatformBridge;
 class NotificationUIManager;
-class PrefRegistrySimple;
 class PrefService;
-class Profile;
 class ProfileManager;
 class StatusTray;
 class WatchDogThread;
 #if BUILDFLAG(ENABLE_WEBRTC)
 class WebRtcLogUploader;
 #endif
 
 namespace safe_browsing {
 class SafeBrowsingService;
 }
@@ skipping 237 matching lines @@
   // Returns the Physical Web data source.
   virtual physical_web::PhysicalWebDataSource* GetPhysicalWebDataSource() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BrowserProcess);
 };
 
 extern BrowserProcess* g_browser_process;
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_H_