Add an #ifdef for a ChromeOS-only resource in WebUI.

BUG=333201

Review URL: https://codereview.chromium.org/446063006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@287992 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/webui/about_ui.cc

@@ -1005,8 +1005,10 @@ void AboutUIHTMLSource::StartDataRequest(
     int idr = IDR_CREDITS_HTML;
     if (path == kCreditsJsPath)
       idr = IDR_CREDITS_JS;
+#if defined(OS_CHROMEOS)
     else if (path == kKeyboardUtilsPath)
       idr = IDR_KEYBOARD_UTILS_JS;
+#endif
 
     response = ResourceBundle::GetSharedInstance().GetRawDataResource(
         idr).as_string();