Omnibox Field Trial: Make HQP Score Bookmarks More Highly

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"
@@ skipping 287 matching lines @@
   return undemotable_types;
 }
 
 bool OmniboxFieldTrial::ReorderForLegalDefaultMatch(
     AutocompleteInput::PageClassification current_page_classification) {
   return OmniboxFieldTrial::GetValueForRuleInContext(
       kReorderForLegalDefaultMatchRule, current_page_classification) ==
       kReorderForLegalDefaultMatchRuleEnabled;
 }
 
+int OmniboxFieldTrial::HQPBookmarkValue() {
+  std::string bookmark_value_str = chrome_variations::
+      GetVariationParamValue(kBundledExperimentFieldTrialName,
+                             kHQPBookmarkValueRule);
+  if (bookmark_value_str.empty())
+    return 1;
+  // This is a best-effort conversion; we trust the hand-crafted parameters
+  // downloaded from the server to be perfect.  There's no need for handle
+  // errors smartly.
+  int bookmark_value;
+  base::StringToInt(bookmark_value_str, &bookmark_value);
+  return bookmark_value;
+}
+
 const char OmniboxFieldTrial::kBundledExperimentFieldTrialName[] =
     "OmniboxBundledExperimentV1";
 const char OmniboxFieldTrial::kShortcutsScoringMaxRelevanceRule[] =
     "ShortcutsScoringMaxRelevance";
 const char OmniboxFieldTrial::kSearchHistoryRule[] = "SearchHistory";
 const char OmniboxFieldTrial::kDemoteByTypeRule[] = "DemoteByType";
 const char OmniboxFieldTrial::kUndemotableTopTypeRule[] = "UndemotableTopTypes";
 const char OmniboxFieldTrial::kReorderForLegalDefaultMatchRule[] =
     "ReorderForLegalDefaultMatch";
+const char OmniboxFieldTrial::kHQPBookmarkValueRule[] =
+    "HQPBookmarkValue";
 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>:
@@ skipping 45 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();
 }