Omnibox: Clobber HQP Cache File when user mucks with history

chrome/browser/history/in_memory_url_index.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_IN_MEMORY_URL_INDEX_H_
 #define CHROME_BROWSER_HISTORY_IN_MEMORY_URL_INDEX_H_
 
 #include <functional>
 #include <map>
 #include <set>
@@ skipping 279 matching lines @@
   // Set to true once the shutdown process has begun.
   bool shutdown_;
 
   // Set to true once the index restoration is complete.
   bool restored_;
 
   // Set to true when changes to the index have been made and the index needs
   // to be cached. Set to false when the index has been cached. Used as a
   // temporary safety check to insure that the cache is saved before the
   // index has been destructed.
-  // TODO(mrossetti): Eliminate once the transition to SQLite has been done.
-  // http://crbug.com/83659
   bool needs_to_be_cached_;
 
   DISALLOW_COPY_AND_ASSIGN(InMemoryURLIndex);
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_IN_MEMORY_URL_INDEX_H_