Code cleanup

chrome/browser/history/android/android_history_provider_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_ANDROID_ANDROID_HISTORY_PROVIDER_SERVICE_H_
 #define CHROME_BROWSER_HISTORY_ANDROID_ANDROID_HISTORY_PROVIDER_SERVICE_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/task/cancelable_task_tracker.h"
-#include "chrome/browser/common/cancelable_request.h"
 #include "chrome/browser/history/android/android_history_types.h"
 #include "sql/statement.h"
 
 class Profile;
 
 // This class provides the methods to communicate with history backend service
 // for the Android content provider.
 // The methods of this class must run on the UI thread to cooperate with the
 // BookmarkModel task posted in the DB thread.
-class AndroidHistoryProviderService : public CancelableRequestProvider {
+class AndroidHistoryProviderService {
  public:
   explicit AndroidHistoryProviderService(Profile* profile);
   virtual ~AndroidHistoryProviderService();
 
   // The callback definitions ------------------------------------------------
 
   // Callback invoked when a method creating an |AndroidStatement| object is
   // complete. The pointer is NULL if the creation failed.
   typedef base::Callback<void(history::AndroidStatement*)> QueryCallback;
 
@@ skipping 136 matching lines @@
       const QueryCallback& callback,
       base::CancelableTaskTracker* tracker);
 
  private:
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(AndroidHistoryProviderService);
 };
 
 #endif  // CHROME_BROWSER_HISTORY_ANDROID_ANDROID_HISTORY_PROVIDER_SERVICE_H_