<webview> + <extensionview>: Create a maybeHandleMutation call into attributes

extensions/renderer/resources/guest_view/web_view.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This module implements WebView (<webview>) as a custom element that wraps a
 // BrowserPlugin object element. The object element is hidden within
 // the shadow DOM of the WebView element.
 
 var DocumentNatives = requireNative('document_natives');
 var GuestView = require('guestView').GuestView;
@@ skipping 89 matching lines @@
           WebViewConstants.ERROR_MSG_CONTENTWINDOW_NOT_AVAILABLE);
     }.bind(this),
     // No setter.
     enumerable: true
   });
 };
 
 // This observer monitors mutations to attributes of the <webview>.
 WebViewImpl.prototype.handleAttributeMutation = function(
     attributeName, oldValue, newValue) {
-  if (!this.attributes[attributeName] ||
-      this.attributes[attributeName].ignoreMutation) {
+  if (!this.attributes[attributeName]) {
     return;
   }
 
   // Let the changed attribute handle its own mutation;
-  this.attributes[attributeName].handleMutation(oldValue, newValue);
+  this.attributes[attributeName].maybeHandleMutation(oldValue, newValue);
 };
 
 WebViewImpl.prototype.onSizeChanged = function(webViewEvent) {
   var newWidth = webViewEvent.newWidth;
   var newHeight = webViewEvent.newHeight;
 
   var element = this.element;
 
   var width = element.offsetWidth;
   var height = element.offsetHeight;
@@ skipping 135 matching lines @@
 WebViewImpl.prototype.setupExperimentalContextMenus = function() {};
 WebViewImpl.prototype.maybeSetupExperimentalChromeWebViewEvents =
   function(request) {
     return request;
 };
 
 GuestViewContainer.registerElement(WebViewImpl);
 
 // Exports.
 exports.WebViewImpl = WebViewImpl;