[Cleanup] Remove some expired omnibox field trials.

components/omnibox/browser/base_search_provider.cc

Index: components/omnibox/browser/base_search_provider.cc
diff --git a/components/omnibox/browser/base_search_provider.cc b/components/omnibox/browser/base_search_provider.cc
index 0c1feb15addfdd08e465f7df20c7dda6f91a0e64..ea5181501ec156fd3c927e47862edfa507a9726c 100644
--- a/components/omnibox/browser/base_search_provider.cc
+++ b/components/omnibox/browser/base_search_provider.cc
@@ -151,16 +151,6 @@ void BaseSearchProvider::AddProviderInfo(ProvidersInfo* provider_info) const {
   metrics::OmniboxEventProto_ProviderInfo& new_entry = provider_info->back();
   new_entry.set_provider(AsOmniboxEventProviderType());
   new_entry.set_provider_done(done_);
-  std::vector<uint32_t> field_trial_hashes;
-  OmniboxFieldTrial::GetActiveSuggestFieldTrialHashes(&field_trial_hashes);

[Mark P, 2016/01/14 05:31:02]

This code cannot be removed because it's part of the omnibox bundled field
trial.  See my comment elsewhere.

[Ilya Sherman, 2016/01/14 05:40:41]

Done.

-  for (size_t i = 0; i < field_trial_hashes.size(); ++i) {
-    if (field_trial_triggered_)
-      new_entry.mutable_field_trial_triggered()->Add(field_trial_hashes[i]);
-    if (field_trial_triggered_in_session_) {
-      new_entry.mutable_field_trial_triggered_in_session()->Add(
-          field_trial_hashes[i]);
-    }
-  }
 }
 
 // static