Refactored extensionOptions to use the new guestViewAttributes module.

extensions/renderer/resources/guest_view/web_view/web_view_attributes.js

Index: extensions/renderer/resources/guest_view/web_view/web_view_attributes.js
diff --git a/extensions/renderer/resources/guest_view/web_view/web_view_attributes.js b/extensions/renderer/resources/guest_view/web_view/web_view_attributes.js
index 3b666a24e54754e0db67326aede9717a782566f4..ce538fdc3df3c2ff51c44d006036eae868eed295 100644
--- a/extensions/renderer/resources/guest_view/web_view/web_view_attributes.js
+++ b/extensions/renderer/resources/guest_view/web_view/web_view_attributes.js
@@ -5,8 +5,8 @@
 // This module implements the attributes of the <webview> tag.
 
 var GuestViewAttributes = require('guestViewAttributes').GuestViewAttributes;
-var WebViewImpl = require('webView').WebViewImpl;
 var WebViewConstants = require('webViewConstants').WebViewConstants;
+var WebViewImpl = require('webView').WebViewImpl;
 var WebViewInternal = require('webViewInternal').WebViewInternal;
 
 // -----------------------------------------------------------------------------
@@ -252,9 +252,7 @@ SrcAttribute.prototype.parse = function() {
 // -----------------------------------------------------------------------------
 
 // Sets up all of the webview attributes.
-WebViewImpl.prototype.setupWebViewAttributes = function() {
-  this.attributes = {};
-
+WebViewImpl.prototype.setupAttributes = function() {
   this.attributes[WebViewConstants.ATTRIBUTE_ALLOWSCALING] =
       new AllowScalingAttribute(this);
   this.attributes[WebViewConstants.ATTRIBUTE_ALLOWTRANSPARENCY] =