Adding knobs on HQP provider.

components/omnibox/omnibox_field_trial.cc

Index: components/omnibox/omnibox_field_trial.cc
diff --git a/components/omnibox/omnibox_field_trial.cc b/components/omnibox/omnibox_field_trial.cc
index 74f1100ed0f1de92c567d96db1838c272dd65f16..29139c230df7b0b1fd1f10a6537d33f16f5c952e 100644
--- a/components/omnibox/omnibox_field_trial.cc
+++ b/components/omnibox/omnibox_field_trial.cc
@@ -289,6 +289,38 @@ int OmniboxFieldTrial::HQPBookmarkValue() {
   return bookmark_value;
 }
 
+bool OmniboxFieldTrial::HQPExperimentalScoringEnabled() {
+  return variations::GetVariationParamValue(
+      kBundledExperimentFieldTrialName,
+      kHQPExperimentalScoringEnabledParam) == "true";
+}
+
+std::string OmniboxFieldTrial::HQPExperimentalScoringBuckets() {
+  if (!HQPExperimentalScoringEnabled())
+    return "";
+
+  return variations::GetVariationParamValue(
+      kBundledExperimentFieldTrialName,
+      kHQPExperimentalScoringBucketsParam);
+}
+
+float OmniboxFieldTrial::HQPExperimentalTopicalityThreshold() {
+  if (!HQPExperimentalScoringEnabled())
+    return -1;
+
+  std::string topicality_threhold_str =
+    variations::GetVariationParamValue(
+        kBundledExperimentFieldTrialName,
+        kHQPExperimentalScoringTopicalityThresholdParam);
+
+  if (topicality_threhold_str.empty())
+    return -1;
+
+  double topicality_threshold;
+  base::StringToDouble(topicality_threhold_str, &topicality_threshold);

[Mark P, 2015/02/11 21:57:30]

You might as well use the return value

[Ashok vardhan, 2015/02/12 19:56:31]

Done.

+  return static_cast<float>(topicality_threshold);
+}
+
 bool OmniboxFieldTrial::HQPAllowMatchInTLDValue() {
   return variations::GetVariationParamValue(
       kBundledExperimentFieldTrialName,
@@ -381,6 +413,14 @@ const char OmniboxFieldTrial::kHUPNewScoringVisitedCountHalfLifeTimeParam[] =
 const char OmniboxFieldTrial::kHUPNewScoringVisitedCountScoreBucketsParam[] =
     "VisitedCountScoreBuckets";
 
+const char OmniboxFieldTrial::kHQPExperimentalScoringEnabledParam[] =
+    "HQPExperimentalScoringEnabled";
+const char OmniboxFieldTrial::kHQPExperimentalScoringBucketsParam[] =
+    "HQPExperimentalScoringBuckets";
+const char
+    OmniboxFieldTrial::kHQPExperimentalScoringTopicalityThresholdParam[] =
+      "HQPExperimentalScoringTopicalityThreshold";
+
 // static
 int OmniboxFieldTrial::kDefaultMinimumTimeBetweenSuggestQueriesMs = 100;