Omnibox SearchProvider Experiment Client Implementation.

chrome/browser/autocomplete/autocomplete.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_AUTOCOMPLETE_AUTOCOMPLETE_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_H_
 #pragma once
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/string16.h"
 #include "base/time.h"
 #include "base/timer.h"
 #include "chrome/browser/sessions/session_id.h"
 #include "googleurl/src/gurl.h"
 #include "googleurl/src/url_parse.h"
 
+// TODO(msw): Update with comment explaining experiments???
 // The AutocompleteController is the center of the autocomplete system.  A
 // class creates an instance of the controller, which in turn creates a set of
 // AutocompleteProviders to serve it.  The owning class can ask the controller
 // to Start() a query; the controller in turn passes this call down to the
 // providers, each of which keeps track of its own matches and whether it has
 // finished processing the query.  When a provider gets more matches or finishes
 // processing, it notifies the controller, which merges the combined matches
 // together and makes the result available to interested observers.
 //
 // The owner may also cancel the current query by calling Stop(), which the
@@ skipping 764 matching lines @@
   // the time the user began typing (this should only happen in
   // unit tests), this elapsed time is set to -1 milliseconds.
   base::TimeDelta elapsed_time_since_user_first_modified_omnibox;
   // Inline autocompleted length (if displayed).
   size_t inline_autocompleted_length;
   // Result set.
   const AutocompleteResult& result;
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_H_