Partially componentize //chrome/browser/search/search.{h,cc}

components/omnibox/browser/omnibox_field_trial.cc

Index: components/omnibox/browser/omnibox_field_trial.cc
diff --git a/components/omnibox/browser/omnibox_field_trial.cc b/components/omnibox/browser/omnibox_field_trial.cc
index 73a51ff03b9d486321945e5e3340999e547fd059..987a3ae6912a5bc4d58f1a460e7ecea986bf48f3 100644
--- a/components/omnibox/browser/omnibox_field_trial.cc
+++ b/components/omnibox/browser/omnibox_field_trial.cc
@@ -483,7 +483,7 @@ std::string OmniboxFieldTrial::GetValueForRuleInContext(
   const std::string page_classification_str =
       base::IntToString(static_cast<int>(page_classification));
   const std::string instant_extended =
-      chrome::IsInstantExtendedAPIEnabled() ? "1" : "0";
+      search::IsInstantExtendedAPIEnabled() ? "1" : "0";
   // Look up rule in this exact context.
   VariationParams::const_iterator it = params.find(
       rule + ":" + page_classification_str + ":" + instant_extended);