Clean up the unused Suggest field trial and make GetActiveSuggestFieldTrialHash

chrome/browser/autocomplete/search_provider_unittest.cc

Index: chrome/browser/autocomplete/search_provider_unittest.cc
diff --git a/chrome/browser/autocomplete/search_provider_unittest.cc b/chrome/browser/autocomplete/search_provider_unittest.cc
index 3266369bc5d73392bdbd4fc9a00d9b3ff90cd58f..54bbdb11e432e176032ff88abac0ddb5598d0f9c 100644
--- a/chrome/browser/autocomplete/search_provider_unittest.cc
+++ b/chrome/browser/autocomplete/search_provider_unittest.cc
@@ -168,7 +168,9 @@ void SearchProviderTest::SetUpTestCase() {
   // Set up Suggest experiments.
   field_trial_list_ = new base::FieldTrialList(
       new metrics::SHA1EntropyProvider("foo"));
-  OmniboxFieldTrial::ActivateStaticTrials();
+  base::FieldTrial* trial = base::FieldTrialList::CreateFieldTrial(
+      "AutocompleteDynamicTrial_0", "DefaultGroup");
+  trial->group();
 }
 
 // static