Change google search parameter to gcx from cx in experiment

chrome/browser/search_engines/template_url.cc

Index: chrome/browser/search_engines/template_url.cc
===================================================================
--- chrome/browser/search_engines/template_url.cc	(revision 98640)
+++ chrome/browser/search_engines/template_url.cc	(working copy)
@@ -421,15 +421,13 @@
       }
 
       case GOOGLE_SEARCH_FIELDTRIAL_GROUP: {
-#if 0  // Disable until a decision is made about what parameter to use.
         static bool use_suggest_prefix =
             base::FieldTrialList::TrialExists("SuggestHostPrefix");
         if (use_suggest_prefix) {
           static bool used_www = (base::FieldTrialList::FindFullName(
               "SuggestHostPrefix") == "Www_Prefix");
-          url.insert(i->index, used_www ? "cx=w&" : "cx=c&");
+          url.insert(i->index, used_www ? "gcx=w&" : "gcx=c&");
         }
-#endif  // 0
         break;
       }