Omnibox: Create HistoryQuickProvider new scoring field trial.

chrome/browser/autocomplete/autocomplete_field_trial.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_FIELD_TRIAL_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_FIELD_TRIAL_H_
 #pragma once
 
 #include <string>
 
@@ skipping 33 matching lines @@
 
   // Gets the group name (as a number) to use when sending a suggest query
   // to Google.  Should only be called if InSuggestFieldTrial().
   static int GetSuggestGroupNameAsNumber();
 
   // Gets the maximum number of groups in the suggest field trial.
   // (Useful for telling UMA_HISTOGRAM_ENUMERATION the number of buckets
   // to create.)
   static int GetSuggestNumberOfGroups();
 
+  // ---------------------------------------------------------
+  // For the History Quick Provider new scoring field trial.
+
+  // Returns whether the user is in any field trial group for this
+  // field trial.  False indicates that the field trial wasn't
+  // successfully created for some reason.
+  static bool InHQPNewScoringFieldTrial();
+
+  // Returns whether the user should get the experimental setup or
+  // the default setup for this field trial.  The experiment
+  // group uses "new scoring" (a complex multiplicative calculation
+  // that, among other differences from "old scoring", uses word
+  // break information).
+  static bool InHQPNewScoringFieldTrialExperimentGroup();
+
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(AutocompleteFieldTrial);
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_FIELD_TRIAL_H_