[ios] Pass more --jscomp_error switches to the closure Compiler.

components/translate/ios/browser/resources/language_detection.js

Index: components/translate/ios/browser/resources/language_detection.js
diff --git a/components/translate/ios/browser/resources/language_detection.js b/components/translate/ios/browser/resources/language_detection.js
index d1fb9f98711162826181b2d9470188b7801f0a42..6e2f37289213641f4ee31b65bbf765c67a767659 100644
--- a/components/translate/ios/browser/resources/language_detection.js
+++ b/components/translate/ios/browser/resources/language_detection.js
@@ -2,8 +2,20 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-__gCrWeb['languageDetection'] = {};
+/**
+ * @fileoverview Installs Language Detection management functions on the
+ * __gCrWeb object.
+ *
+ * TODO(crbug.com/659442): Enable checkTypes error for this file.
+ * @suppress {checkTypes}
+ */
+
+__gCrWeb.languageDetection = {};
 
+// Store languageDetection namespace object in a global __gCrWeb object
+// referenced by a string, so it does not get renamed by closure compiler during
+// the minification.
+__gCrWeb['languageDetection'] = __gCrWeb.languageDetection;
 
 (function() {
 /**