Site Settings Desktop: Fix issues with entering URL patterns.

chrome/browser/resources/settings/site_settings/add_site_dialog.js

Index: chrome/browser/resources/settings/site_settings/add_site_dialog.js
diff --git a/chrome/browser/resources/settings/site_settings/add_site_dialog.js b/chrome/browser/resources/settings/site_settings/add_site_dialog.js
index e7ceeed3a5363371a2980eb12ebdfa2e3e22affa..0f5b8d30621554240fa139b6735a79ad19c74739 100644
--- a/chrome/browser/resources/settings/site_settings/add_site_dialog.js
+++ b/chrome/browser/resources/settings/site_settings/add_site_dialog.js
@@ -40,8 +40,7 @@ Polymer({
    * @private
    */
   validate_: function() {
-    var pattern = this.addPatternWildcard(this.site_);

[Finnur, 2016/09/05 11:23:17]

Adding the wildcard prefix during validate is wrong because once the wildcard
has been added, the pattern is basically always valid (at least that's how the
pattern validation in C++ works, it seems).

[dschuyler, 2016/09/06 18:20:29]

Acknowledged.

-    this.browserProxy.isPatternValid(pattern).then(function(isValid) {
+    this.browserProxy.isPatternValid(this.site_).then(function(isValid) {
       this.$.add.disabled = !isValid;
     }.bind(this));
   },