Cleanup android specific code of //chrome/browser/history

chrome/browser/history/history_service.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.
 
 #ifndef CHROME_BROWSER_HISTORY_HISTORY_SERVICE_H_
 #define CHROME_BROWSER_HISTORY_HISTORY_SERVICE_H_
 
 #include <set>
 #include <vector>
 
@@ skipping 21 matching lines @@
 #include "components/visitedlink/browser/visitedlink_delegate.h"
 #include "content/public/browser/download_manager_delegate.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/common/page_transition_types.h"
 #include "sql/init_status.h"
 #include "sync/api/syncable_service.h"
 #include "ui/base/layout.h"
 
 #if defined(OS_ANDROID)
-#include "chrome/browser/history/android/android_history_provider_service.h"
+class AndroidHistoryProviderService;
 #endif
-
 class BookmarkService;
 class GURL;
 class HistoryURLProvider;
 class PageUsageData;
 class PageUsageRequest;
 class Profile;
 struct HistoryURLProviderParams;
 
 namespace base {
 class FilePath;
@@ skipping 986 matching lines @@
   scoped_ptr<history::InMemoryURLIndex> in_memory_url_index_;
 
   ObserverList<history::VisitDatabaseObserver> visit_database_observers_;
 
   history::DeleteDirectiveHandler delete_directive_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(HistoryService);
 };
 
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_SERVICE_H_