Parametrize Suggest polling strategy and delay. Also add a parameter

components/omnibox/omnibox_field_trial.h

Index: components/omnibox/omnibox_field_trial.h
diff --git a/components/omnibox/omnibox_field_trial.h b/components/omnibox/omnibox_field_trial.h
index 07377bdc7052aa8085c479d91334ed37bdb3c757..b0d89c7b1cba82982041608054f38dc7549b891b 100644
--- a/components/omnibox/omnibox_field_trial.h
+++ b/components/omnibox/omnibox_field_trial.h
@@ -281,6 +281,17 @@ class OmniboxFieldTrial {
   static bool DisplayHintTextWhenPossible();
 
   // ---------------------------------------------------------
+  // For Search Provider related experiments.

[Mark P, 2014/10/21 21:28:22]

nit: SearchProvider

[Bart N., 2014/10/22 01:19:08]

Done.

+
+  // Returns true if the search provider should not be caching results.
+  static bool DisableResultsCaching();
+
+  // Returns how the search provider should poll Suggest. Currently, we support
+  // measuring polling delay since the last keystroke or last suggest request.
+  static void GetSuggestPollingStrategy(bool* since_the_last_request,
+                                        int* polling_delay_ms);
+
+  // ---------------------------------------------------------
   // Exposed publicly for the sake of unittests.
   static const char kBundledExperimentFieldTrialName[];
   // Rule names used by the bundled experiment.
@@ -297,6 +308,10 @@ class OmniboxFieldTrial {
   static const char kAnswersInSuggestRule[];
   static const char kAddUWYTMatchEvenIfPromotedURLsRule[];
   static const char kDisplayHintTextWhenPossibleRule[];
+  // Search Provider experiments.

[Mark P, 2014/10/21 21:28:22]

nit: comment unnecessary
(we omit all similar comments in this list of rules)

[Bart N., 2014/10/22 01:19:08]

Done.

+  static const char kDisableResultsCachingRule[];
+  static const char kSuggestPollingDelaySinceTheLastRequestRule[];

[Mark P, 2014/10/21 21:28:22]

nit: I'd prefer this rule name had a verb such as
kMeasureSuggestPollingDelayFromLastRequestRule

[Bart N., 2014/10/22 01:19:08]

Done.

+  static const char kSuggestPollingDelayMsRule[];
 
   // Parameter names used by the HUP new scoring experiments.
   static const char kHUPNewScoringEnabledParam[];