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

ios/web/web_state/js/resources/message.js

Index: ios/web/web_state/js/resources/message.js
diff --git a/ios/web/web_state/js/resources/message.js b/ios/web/web_state/js/resources/message.js
index 1649a64e98de39008a18df015a63653fffcf2b3e..a9cd29b3b0d1f98f6389085ea7bab955baa4f2d9 100644
--- a/ios/web/web_state/js/resources/message.js
+++ b/ios/web/web_state/js/resources/message.js
@@ -35,7 +35,7 @@ __gCrWeb.message = {};
   /**
    * Invokes a command on the Objective-C side.
    * @param {Object} command The command in a JavaScript object.
-   * @private
+   * @public

[dpapad, 2016/10/26 17:05:24]

No need for @public. I don't even think such an annotation exists, but
regardless, no @private/@protected implies public.

[Eugene But (OOO till 7-30), 2016/10/26 17:54:45]

Done.

[Justin Donnelly, 2016/10/26 21:06:52]

If you prefer not to use it for stylistic reasons, that's fine. But @public
exists
(https://github.com/google/closure-compiler/wiki/Annotating-JavaScript-for-the...)
and seems to be in wide use
(https://cs.corp.google.com/search/?q=@public+file:%5C.js). One person's noise
is another person's explicitness and clarity. :)

[Eugene But (OOO till 7-30), 2016/10/26 21:16:23]

Thanks! I would prefer to use @public if it's a real thing. Demetrios, what do
you think?

[Eugene But (OOO till 7-30), 2016/10/27 23:23:21]

Added @public back.

    */
   __gCrWeb.message.invokeOnHost = function(command) {
     messageQueue_.queue.push(command);
@@ -74,7 +74,7 @@ __gCrWeb.message = {};
     queueObject.queue.forEach(function(command) {
         var stringifiedMessage = __gCrWeb.common.JSONStringify({
             "crwCommand": command,
-            "crwWindowId": __gCrWeb.windowId
+            "crwWindowId": __gCrWeb['windowId']
         });
         // A web page can override |window.webkit| with any value. Deleting the
         // object ensures that original and working implementation of