Omnibox: Call Stop() on all Providers After Certain Amount of Time

chrome/browser/omnibox/omnibox_field_trial.cc

 // 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.
 
 #include "chrome/browser/omnibox/omnibox_field_trial.h"
 
 #include <string>
 
 #include "base/metrics/field_trial.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/strings/string_number_conversions.h"
 #include "chrome/common/metrics/metrics_util.h"
 #include "chrome/common/metrics/variations/variation_ids.h"
 #include "chrome/common/metrics/variations/variations_util.h"
 
 namespace {
 
 // Field trial names.
 const char kDisallowInlineHQPFieldTrialName[] = "OmniboxDisallowInlineHQP";
 const char kHQPNewScoringFieldTrialName[] = "OmniboxHQPNewScoringMax1400";
 const char kHUPCullRedirectsFieldTrialName[] = "OmniboxHUPCullRedirects";
 const char kHUPCreateShorterMatchFieldTrialName[] =
     "OmniboxHUPCreateShorterMatch";
 const char kHQPReplaceHUPScoringFieldTrialName[] =
     "OmniboxHQPReplaceHUPProhibitTrumpingInlineableResult";
+const char kStopTimerFieldTrialName[] = "OmniboxStopTimer";
 
 // The autocomplete dynamic field trial name prefix.  Each field trial is
 // configured dynamically and is retrieved automatically by Chrome during
 // the startup.
 const char kAutocompleteDynamicFieldTrialPrefix[] = "AutocompleteDynamicTrial_";
 // The maximum number of the autocomplete dynamic field trials (aka layers).
 const int kMaxAutocompleteDynamicFieldTrials = 5;
 
 // Field trial experiment probabilities.
 
@@ skipping 29 matching lines @@
 
 // For the field trial that removes searching/scoring URLs from
 // HistoryURL provider and adds a HistoryURL-provider-like scoring
 // mode to HistoryQuick provider, put 0% ( = 0/100 ) of the users in
 // the experiment group.
 const base::FieldTrial::Probability
     kHQPReplaceHUPScoringFieldTrialDivisor = 100;
 const base::FieldTrial::Probability
     kHQPReplaceHUPScoringFieldTrialExperimentFraction = 0;
 
+// Experiment group names.
+
+const char kStopTimerExperimentGroupName[] = "UseStopTimer";
 
 // Field trial IDs.
 // Though they are not literally "const", they are set only once, in
 // ActivateStaticTrials() below.
 
 // Whether the static field trials have been initialized by
 // ActivateStaticTrials() method.
 bool static_field_trials_initialized = false;
 
 // Field trial ID for the disallow-inline History Quick Provider
@@ skipping 195 matching lines @@
 
 bool OmniboxFieldTrial::InHQPReplaceHUPScoringFieldTrialExperimentGroup() {
   if (!InHQPReplaceHUPScoringFieldTrial())
     return false;
 
   // Return true if we're in the experiment group.
   const int group = base::FieldTrialList::FindValue(
       kHQPReplaceHUPScoringFieldTrialName);
   return group == hqp_replace_hup_scoring_experiment_group;
 }
+
+bool OmniboxFieldTrial::InStopTimerFieldTrialExperimentGroup() {
+  return (base::FieldTrialList::FindFullName(kStopTimerFieldTrialName) ==
+          kStopTimerExperimentGroupName);
+}