MD Settings: Set all content setting values in Site Details Javascript.

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

Index: chrome/browser/resources/settings/site_settings/site_details_permission.js
diff --git a/chrome/browser/resources/settings/site_settings/site_details_permission.js b/chrome/browser/resources/settings/site_settings/site_details_permission.js
index 5cb99477cb0aab8b4f68381d2790a32098a018b2..3f1b52e60f6719756d5db7fe7bb9855593d487ed 100644
--- a/chrome/browser/resources/settings/site_settings/site_details_permission.js
+++ b/chrome/browser/resources/settings/site_settings/site_details_permission.js
@@ -47,22 +47,12 @@ Polymer({
   },
 
   /**
-   * Sets the site to display.
+   * Updates the drop-down value after |site| has changed.
    * @param {!SiteException} site The site to display.
    * @private
    */
   siteChanged_: function(site) {
-
-    this.browserProxy.getExceptionList(this.category).then(
-        function(exceptionList) {
-      for (var i = 0; i < exceptionList.length; ++i) {
-        if (exceptionList[i].embeddingOrigin == site.embeddingOrigin &&
-            this.sameOrigin_(exceptionList[i].origin, site.origin)) {
-          this.$.permission.value = exceptionList[i].setting;
-          break;
-        }
-      }
-    }.bind(this));
+    this.$.permission.value = site.setting;
   },
 
   /**