Cleanup HistoryService and HistoryBackend interface

chrome/browser/history/android/android_provider_backend.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_ANDROID_ANDROID_PROVIDER_BACKEND_H_
 #define CHROME_BROWSER_HISTORY_ANDROID_ANDROID_PROVIDER_BACKEND_H_
 
 #include <list>
 #include <set>
 
@@ skipping 31 matching lines @@
 // Android_urls and android_cache database is only updated before the related
 // methods are accessed. A data change will not triger the update.
 //
 // The android_cache database is deleted when shutdown.
 class AndroidProviderBackend {
  public:
   AndroidProviderBackend(const base::FilePath& cache_db_name,
                          HistoryDatabase* history_db,
                          ThumbnailDatabase* thumbnail_db,
                          HistoryClient* history_client,
-                         HistoryBackendNotifier* nofifier);
+                         HistoryBackendNotifier* notifier);
 
   ~AndroidProviderBackend();
 
   // Bookmarks ----------------------------------------------------------------
   //
   // Runs the given query and returns the result on success, NULL on error or
   // the |projections| is empty.
   //
   // |projections| is the vector of the result columns.
   // |selection| is the SQL WHERE clause without 'WHERE'.
@@ skipping 277 matching lines @@
   bool initialized_;
 
   HistoryBackendNotifier* notifier_;
 
   DISALLOW_COPY_AND_ASSIGN(AndroidProviderBackend);
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_ANDROID_ANDROID_PROVIDER_BACKEND_H_