<webview>: Implement WebRequest API

chrome/renderer/resources/extensions/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.
 
 // Shim that simulates a <webview> tag via Mutation Observers.
 //
 // The actual tag is implemented via the browser plugin. The internals of this
 // are hidden via Shadow DOM.
 
+var GetExtensionAPIDefinition =
+      requireNative('apiDefinitions').GetExtensionAPIDefinition;
+var WebRequestEvent = require('webRequest').webRequestEvent;
+
 var watchForTag = require("tagWatcher").watchForTag;
 
 var WEB_VIEW_ATTRIBUTES = ['name', 'src', 'partition', 'autosize', 'minheight',
     'minwidth', 'maxheight', 'maxwidth'];
 
 // All exposed api methods for <webview>, these are forwarded to the browser
 // plugin.
 var WEB_VIEW_API_METHODS = [
   'back',
   'canGoBack',
@@ skipping 84 matching lines @@
       get: function() {
         return objectNode[attributeName];
       },
       set: function(value) {
         objectNode[attributeName] = value;
       },
       enumerable: true
     });
   }, this);
 
+
+  // Populate the WebRequest events from the API definition.
+  var webRequestDefinition =
+      GetExtensionAPIDefinition('webRequest')[0];
+  for (var i = 0; i < webRequestDefinition.events.length; ++i) {
+    Object.defineProperty(self.node_, webRequestDefinition.events[i].name, {
+      get: function(webRequestEvent) {
+        return function() {
+          if (!self[webRequestEvent.name + '_']) {
+            self[webRequestEvent.name + '_'] =
+                new WebRequestEvent(
+                    'webview.' + webRequestEvent.name,
+                    webRequestEvent.parameters,
+                    webRequestEvent.extraParameters, null,
+                    self.objectNode_.getInstanceId());
+          }
+          return self[webRequestEvent.name + '_'];
+        }
+      }(webRequestDefinition.events[i]),
+      // No setter.
+      enumerable: true
+    });
+  }
+
   // We cannot use {writable: true} property descriptor because we want dynamic
   // getter value.
   Object.defineProperty(this.node_, 'contentWindow', {
     get: function() {
       // TODO(fsamuel): This is a workaround to enable
       // contentWindow.postMessage until http://crbug.com/152006 is fixed.
       if (objectNode.contentWindow)
         return objectNode.contentWindow.self;
       console.error('contentWindow is not available at this time. ' +
           'It will become available when the page has finished loading.');
@@ skipping 44 matching lines @@
   var node = this.node_;
   this.objectNode_.addEventListener('-internal-' + eventname, function(e) {
     var evt = new Event(eventname, { bubbles: true });
     var detail = e.detail ? JSON.parse(e.detail) : {};
     attribs.forEach(function(attribName) {
       evt[attribName] = detail[attribName];
     });
     node.dispatchEvent(evt);
   });
 }