fix(sanitizeUri): sanitize URIs that contain IDEOGRAPHIC SPACE chars

Chrome 62 was not sanitizing dangerous URLs containing
JavaScript, if they started with these "whitespace" characters.

Closes angular#16288

Author: petebacondarwin

src/ng/sanitizeUri.js

@@ -62,7 +62,7 @@ function $$SanitizeUriProvider() {
     return function sanitizeUri(uri, isImage) {
       var regex = isImage ? imgSrcSanitizationWhitelist : aHrefSanitizationWhitelist;
       var normalizedVal;
-      normalizedVal = urlResolve(uri).href;
+      normalizedVal = urlResolve(uri && uri.trim()).href;
       if (normalizedVal !== '' && !normalizedVal.match(regex)) {
         return 'unsafe:' + normalizedVal;
       }