Change google search parameter to gcx from cx in experiment

bug=94454
r=pkasting
Review URL: http://codereview.chromium.org/7801001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@98688 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/search_engines/template_url.cc

@@ -421,15 +421,13 @@ std::string TemplateURLRef::ReplaceSearchTermsUsingTermsData(
       }
 
       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;
       }