Omnibox: Add Field Trial to Skip HistoryURL Provider Searching its Database

components/omnibox/browser/omnibox_field_trial.cc

 // Copyright 2014 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 "components/omnibox/browser/omnibox_field_trial.h"
 
 #include <cmath>
 #include <string>
 
 #include "base/command_line.h"
@@ skipping 416 matching lines @@
     return 10;
   return num_title_words;
 }
 
 bool OmniboxFieldTrial::HQPAlsoDoHUPLikeScoring() {
   return variations::GetVariationParamValue(
       kBundledExperimentFieldTrialName,
       kHQPAlsoDoHUPLikeScoringRule) == "true";
 }
 
+bool OmniboxFieldTrial::HUPSearchDatabase() {
+  const std::string& value = variations::GetVariationParamValue(
+      kBundledExperimentFieldTrialName,
+      kHUPSearchDatabaseRule);
+  return value.empty() || (value == "true");
+}
+
 bool OmniboxFieldTrial::PreventUWYTDefaultForNonURLInputs() {
   return variations::GetVariationParamValue(
       kBundledExperimentFieldTrialName,
       kPreventUWYTDefaultForNonURLInputsRule) == "true";
 }
 
 bool OmniboxFieldTrial::KeywordRequiresRegistry() {
   const std::string& value = variations::GetVariationParamValue(
       kBundledExperimentFieldTrialName,
       kKeywordRequiresRegistryRule);
@@ skipping 42 matching lines @@
 const char
 OmniboxFieldTrial::kMeasureSuggestPollingDelayFromLastKeystrokeRule[] =
     "MeasureSuggestPollingDelayFromLastKeystroke";
 const char OmniboxFieldTrial::kSuggestPollingDelayMsRule[] =
     "SuggestPollingDelayMs";
 const char OmniboxFieldTrial::kHQPFixFrequencyScoringBugsRule[] =
     "HQPFixFrequencyScoringBugs";
 const char OmniboxFieldTrial::kHQPNumTitleWordsRule[] = "HQPNumTitleWords";
 const char OmniboxFieldTrial::kHQPAlsoDoHUPLikeScoringRule[] =
     "HQPAlsoDoHUPLikeScoring";
+const char OmniboxFieldTrial::kHUPSearchDatabaseRule[] =
+    "HUPSearchDatabase";
 const char OmniboxFieldTrial::kPreventUWYTDefaultForNonURLInputsRule[] =
     "PreventUWYTDefaultForNonURLInputs";
 const char OmniboxFieldTrial::kKeywordRequiresRegistryRule[] =
     "KeywordRequiresRegistry";
 const char OmniboxFieldTrial::kKeywordRequiresPrefixMatchRule[] =
     "KeywordRequiresPrefixMatch";
 const char OmniboxFieldTrial::kKeywordScoreForSufficientlyCompleteMatchRule[] =
     "KeywordScoreForSufficientlyCompleteMatch";
 
 const char OmniboxFieldTrial::kHUPNewScoringEnabledParam[] =
@@ skipping 81 matching lines @@
   if (it != params.end())
     return it->second;
   // Fall back to the global instant extended context.
   it = params.find(rule + ":" + page_classification_str + ":*");
   if (it != params.end())
     return it->second;
   // Look up rule in the global context.
   it = params.find(rule + ":*:*");
   return (it != params.end()) ? it->second : std::string();
 }