Revert 170866

chrome/renderer/resources/extensions/web_view.js

Index: chrome/renderer/resources/extensions/web_view.js
===================================================================
--- chrome/renderer/resources/extensions/web_view.js	(revision 170866)
+++ chrome/renderer/resources/extensions/web_view.js	(working copy)
@@ -90,14 +90,6 @@
       this.node_,
       {attributes: true, attributeFilter: WEB_VIEW_ATTRIBUTES});
 
-  var handleObjectMutation = this.handleObjectMutation_.bind(this);
-  var objectObserver = new WebKitMutationObserver(function(mutations) {
-    mutations.forEach(handleObjectMutation);
-  });
-  objectObserver.observe(
-      this.objectNode_,
-      {attributes: true, attributeFilter: WEB_VIEW_ATTRIBUTES});
-
   var objectNode = this.objectNode_;
   // Expose getters and setters for the attributes.
   WEB_VIEW_ATTRIBUTES.forEach(function(attributeName) {
@@ -134,21 +126,13 @@
  * @private
  */
 WebView.prototype.handleMutation_ = function(mutation) {
-  this.objectNode_[mutation.attributeName] =
+  this.node_[mutation.attributeName] =
       this.node_.getAttribute(mutation.attributeName);
 };
 
 /**
  * @private
  */
-WebView.prototype.handleObjectMutation_ = function(mutation) {
-  this.node_.setAttribute(mutation.attributeName,
-      this.objectNode_.getAttribute(mutation.attributeName));
-};
-
-/**
- * @private
- */
 WebView.prototype.setupEvent_ = function(eventname, attribs) {
   var node = this.node_;
   this.objectNode_.addEventListener('-internal-' + eventname, function(e) {