First version of the time slicing on the urls. Not ready for review yet.

chrome/browser/history/history_extension_api.h

 // Copyright (c) 2011 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_EXTENSION_API_H_
 #define CHROME_BROWSER_HISTORY_HISTORY_EXTENSION_API_H_
 #pragma once
 
 #include <string>
 
@@ skipping 65 matching lines @@
  protected:
   // The consumer for the HistoryService callbacks.
   CancelableRequestConsumer cancelable_consumer_;
 
  private:
   // The actual call to SendResponse.  This is required since the semantics for
   // CancelableRequestConsumerT require it to be accessed after the call.
   void SendResponseToCallback();
 };
 
+class GetMostVisitedHistoryFunction : public HistoryFunctionWithCallback {
+ public:
+  virtual bool RunAsyncImpl() OVERRIDE;
+  DECLARE_EXTENSION_FUNCTION_NAME("history.getMostVisited");
+
+  // Callback for the history function to provide results.
+  void QueryComplete(CancelableRequestProvider::Handle handle,
+                     history::MostVisitedURLList data);
+};
+
 class GetVisitsHistoryFunction : public HistoryFunctionWithCallback {
  public:
   // Override HistoryFunction.
   virtual bool RunAsyncImpl() OVERRIDE;
   DECLARE_EXTENSION_FUNCTION_NAME("history.getVisits");
 
   // Callback for the history function to provide results.
   void QueryComplete(HistoryService::Handle request_service,
                      bool success,
                      const history::URLRow* url_row,
@@ skipping 35 matching lines @@
 class DeleteRangeHistoryFunction : public HistoryFunctionWithCallback {
  public:
   virtual bool RunAsyncImpl() OVERRIDE;
   DECLARE_EXTENSION_FUNCTION_NAME("history.deleteRange");
 
   // Callback for the history service to acknowledge deletion.
   void DeleteComplete();
 };
 
 #endif  // CHROME_BROWSER_HISTORY_HISTORY_EXTENSION_API_H_