Refactored extensionOptions to use the new guestViewAttributes module.

extensions/renderer/resources/guest_view/extension_view/extension_view.js

Index: extensions/renderer/resources/guest_view/extension_view/extension_view.js
diff --git a/extensions/renderer/resources/guest_view/extension_view/extension_view.js b/extensions/renderer/resources/guest_view/extension_view/extension_view.js
index 9a132548a32d7ab55104f9e5448d6d3197027cc7..331f508748fc14d42cdfd59dd6863ee501b62871 100644
--- a/extensions/renderer/resources/guest_view/extension_view/extension_view.js
+++ b/extensions/renderer/resources/guest_view/extension_view/extension_view.js
@@ -13,7 +13,6 @@ var ExtensionViewInternal =
 
 function ExtensionViewImpl(extensionviewElement) {
   GuestViewContainer.call(this, extensionviewElement, 'extensionview');
-  this.setupExtensionViewAttributes();
 
   new ExtensionViewEvents(this, this.viewInstanceId);
 }
@@ -42,16 +41,6 @@ ExtensionViewImpl.prototype.buildContainerParams = function() {
   return params;
 };
 
-// This observer monitors mutations to attributes of the <extensionview>.
-ExtensionViewImpl.prototype.handleAttributeMutation = function(
-    attributeName, oldValue, newValue) {
-  if (!this.attributes[attributeName])
-    return;
-
-  // Let the changed attribute handle its own mutation.
-  this.attributes[attributeName].maybeHandleMutation(oldValue, newValue);
-};
-
 ExtensionViewImpl.prototype.onElementDetached = function() {
   this.guest.destroy();