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

components/omnibox/browser/omnibox_field_trial.h

 // 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.
 
 #ifndef COMPONENTS_OMNIBOX_BROWSER_OMNIBOX_FIELD_TRIAL_H_
 #define COMPONENTS_OMNIBOX_BROWSER_OMNIBOX_FIELD_TRIAL_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 281 matching lines @@
   // ---------------------------------------------------------
   // For the HQPNumTitleWords experiment that's part of the
   // bundled omnibox field trial.
 
   // Returns the number of title words that are allowed to contribute
   // to the topicality score.  Words later in the title are ignored.
   // Returns 10 as a default if the experiment isn't active.
   static size_t HQPNumTitleWordsToAllow();
 
   // ---------------------------------------------------------
-  // For the HQPAlsoDoHUPLikeScoring experiment that's part of the
-  // bundled omnibox field trial.
+  // For the replace HUP experiment that's part of the bundled omnibox field
+  // trial.
 
   // Returns whether HistoryQuick provider (HQP) should attempt to score
   // suggestions also with a HistoryURL-provider-like (HUP-like) mode, and
   // assign suggestions the max of this score and the normal score.
   // Returns false if the experiment isn't active.
   static bool HQPAlsoDoHUPLikeScoring();
 
+  // Returns whether HistoryURL provider (HUP) should search its database for
+  // URLs and suggest them.  If false, HistoryURL provider merely creates the
+  // URL-what-you-typed match when appropriate.  Return true if the experiment
+  // isn't active.
+  static bool HUPSearchDatabase();
+
   // ---------------------------------------------------------
   // For the PreventUWYTDefaultForNonURLInputs experiment that's part of the
   // bundled omnibox field trial.
 
   // Returns true if HistoryURL provider should prohibit the URL-what-you-
   // typed match from being the legal default match for non-URL inputs.
   // If this behavior is active, some code in AutocompleteInput::Parse() also
   // gets disabled; this code is unnecessary given the not-allowed-to-be-
   // default constraint.  Returns false if the experiment isn't active.
   static bool PreventUWYTDefaultForNonURLInputs();
@@ skipping 34 matching lines @@
   static const char kHQPAllowMatchInSchemeRule[];
   static const char kZeroSuggestRule[];
   static const char kZeroSuggestVariantRule[];
   static const char kSuggestVariantRule[];
   static const char kDisableResultsCachingRule[];
   static const char kMeasureSuggestPollingDelayFromLastKeystrokeRule[];
   static const char kSuggestPollingDelayMsRule[];
   static const char kHQPFixFrequencyScoringBugsRule[];
   static const char kHQPNumTitleWordsRule[];
   static const char kHQPAlsoDoHUPLikeScoringRule[];
+  static const char kHUPSearchDatabaseRule[];
   static const char kPreventUWYTDefaultForNonURLInputsRule[];
   static const char kKeywordRequiresRegistryRule[];
   static const char kKeywordRequiresPrefixMatchRule[];
   static const char kKeywordScoreForSufficientlyCompleteMatchRule[];
 
   // Parameter names used by the HUP new scoring experiments.
   static const char kHUPNewScoringEnabledParam[];
   static const char kHUPNewScoringTypedCountRelevanceCapParam[];
   static const char kHUPNewScoringTypedCountHalfLifeTimeParam[];
   static const char kHUPNewScoringTypedCountScoreBucketsParam[];
@@ skipping 32 matching lines @@
   // prioritize different wildcard contexts, see the implementation.  How to
   // interpret the value is left to the caller; this is rule-dependent.
   static std::string GetValueForRuleInContext(
       const std::string& rule,
       metrics::OmniboxEventProto::PageClassification page_classification);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(OmniboxFieldTrial);
 };
 
 #endif  // COMPONENTS_OMNIBOX_BROWSER_OMNIBOX_FIELD_TRIAL_H_