Fix some webview plugin attach-ment code.

chrome/renderer/resources/extensions/web_view.js

Index: chrome/renderer/resources/extensions/web_view.js
diff --git a/chrome/renderer/resources/extensions/web_view.js b/chrome/renderer/resources/extensions/web_view.js
index f00fb9b2e6a3440181199217b7d9d4a3e8bba2c3..77bc1a433ce395b36a6da4cb29b393cdc6999db8 100644
--- a/chrome/renderer/resources/extensions/web_view.js
+++ b/chrome/renderer/resources/extensions/web_view.js
@@ -706,9 +706,7 @@ WebViewInternal.prototype.handleDialogEvent =
   };
 
   var self = this;
-  var browserPluginNode = this.browserPluginNode;
   var webviewNode = this.webviewNode;
-
   var requestId = event.requestId;
   var actionTaken = false;
 
@@ -823,7 +821,6 @@ WebViewInternal.prototype.handleNewWindowEvent =
   };
 
   var self = this;
-  var browserPluginNode = this.browserPluginNode;
   var webviewNode = this.webviewNode;
 
   var requestId = event.requestId;
@@ -929,9 +926,7 @@ WebViewInternal.prototype.handlePermissionEvent =
     return;
   }
 
-  var browserPluginNode = this.browserPluginNode;
   var webviewNode = this.webviewNode;
-
   var decisionMade = false;
 
   var validateCall = function() {
@@ -1078,9 +1073,7 @@ WebViewInternal.prototype.attachWindowAndSetUpEvents = function(instanceId) {
     this.setupEvent(eventName, events[eventName]);
   }
 
-  this.browserPluginNode['-internal-attach'](this.instanceId, params);
-
-  return true;
+  return this.browserPluginNode['-internal-attach'](this.instanceId, params);
 };
 
 // Registers browser plugin <object> custom element.