<webview>: Allocate the view instance ID from the WebView shim

chrome/renderer/resources/extensions/web_view_experimental.js

 // Copyright 2013 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 extension to provide permission request API (and possibly other future
 // experimental APIs) for <webview> tag.
 // See web_view.js for details.
 //
 // We want to control the permission API feature in <webview> separately from
 // the <webview> feature itself. <webview> is available in stable channel, but
@@ skipping 20 matching lines @@
   var self = this;
   var request = {};
   var createWebRequestEvent = function(webRequestEvent) {
     return function() {
       if (!self[webRequestEvent.name + '_']) {
         self[webRequestEvent.name + '_'] =
             new WebRequestEvent(
                 'webview.' + webRequestEvent.name,
                 webRequestEvent.parameters,
                 webRequestEvent.extraParameters, null,
-                self.browserPluginNode_.getInstanceId());
+                self.viewInstanceId_);
       }
       return self[webRequestEvent.name + '_'];
     }
   };
 
   // Populate the WebRequest events from the API definition.
   for (var i = 0; i < webRequestSchema.events.length; ++i) {
     var webRequestEvent = createWebRequestEvent(webRequestSchema.events[i]);
     Object.defineProperty(
         request,
@@ skipping 109 matching lines @@
           onTrackedObjectGoneWithRequestId);
       browserPluginNode['-internal-trackObjectLifetime'](dialog, requestId);
     } else {
       actionTaken = true;
       // The default action is equivalent to canceling the dialog.
       browserPluginNode['-internal-setPermission'](requestId, false, '');
       showWarningMessage(detail.messageType);
     }
   });
 };