Omnibox: Make the Controller Reorder Matches for Inlining

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/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/autocomplete/autocomplete_input.h"
 #include "chrome/browser/search/search.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 kHUPCullRedirectsFieldTrialName[] = "OmniboxHUPCullRedirects";
 const char kHUPCreateShorterMatchFieldTrialName[] =
     "OmniboxHUPCreateShorterMatch";
 const char kStopTimerFieldTrialName[] = "OmniboxStopTimer";
-const char kBundledExperimentFieldTrialName[] = "OmniboxBundledExperimentV1";
-
-// Rule names used by the bundled experiment.
-const char kShortcutsScoringMaxRelevanceRule[] = "ShortcutsScoringMaxRelevance";
-const char kSearchHistoryRule[] = "SearchHistory";
-const char kDemoteByTypeRule[] = "DemoteByType";
 
 // 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 209 matching lines @@
       // errors smartly.
       int k, v;
       base::StringToInt(it->first, &k);
       base::StringToInt(it->second, &v);
       (*demotions_by_type)[static_cast<AutocompleteMatchType::Type>(k)] =
           static_cast<float>(v) / 100.0f;
     }
   }
 }
 
+bool OmniboxFieldTrial::ReorderForLegalDefaultMatch(
+    AutocompleteInput::PageClassification current_page_classification) {
+  return OmniboxFieldTrial::GetValueForRuleInContext(
+      kReorderForLegalDefaultMatchRule, current_page_classification) ==
+      kReorderForLegalDefaultMatchRuleEnabled;
+}
+
+const char OmniboxFieldTrial::kBundledExperimentFieldTrialName[] =
+    "OmniboxBundledExperimentV1";
+const char OmniboxFieldTrial::kShortcutsScoringMaxRelevanceRule[] =
+    "ShortcutsScoringMaxRelevance";
+const char OmniboxFieldTrial::kSearchHistoryRule[] = "SearchHistory";
+const char OmniboxFieldTrial::kDemoteByTypeRule[] = "DemoteByType";
+const char OmniboxFieldTrial::kReorderForLegalDefaultMatchRule[] =
+    "ReorderForLegalDefaultMatch";
+const char OmniboxFieldTrial::kReorderForLegalDefaultMatchRuleEnabled[] =
+    "ReorderForLegalDefaultMatch";
+
 // Background and implementation details:
 //
 // Each experiment group in any field trial can come with an optional set of
 // parameters (key-value pairs).  In the bundled omnibox experiment
 // (kBundledExperimentFieldTrialName), each experiment group comes with a
 // list of parameters in the form:
 //   key=<Rule>:
 //       <AutocompleteInput::PageClassification (as an int)>:
 //       <whether Instant Extended is enabled (as a 1 or 0)>
 //     (note that there are no linebreaks in keys; this format is for
@@ skipping 42 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();
 }