[AiS] widen AiS to iOS.

First steps towards allowing AiS on more platforms.

R=stevet@chromium.org
BUG=none

Review URL: https://codereview.chromium.org/447073002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287996 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/search_engines/ui_thread_search_terms_data.cc

@@ -124,6 +124,9 @@ std::string UIThreadSearchTermsData::GetSuggestRequestIdentifier() const {
   }
   return OmniboxFieldTrial::EnableAnswersInSuggest() ?
       "chrome-ext-ansg" : "chrome-ext";
+#elif defined(OS_IOS)
+  return OmniboxFieldTrial::EnableAnswersInSuggest() ?
+      "chrome-ext-ansg" : "chrome-ext";
 #else
   return "chrome-ext";
 #endif