Use const instead of var

lib/renderer/web-view/web-view.js

@@ -264,8 +264,7 @@ const registerBrowserPluginElement = function () {
     this.style.flex = '1 1 auto'
   }
   proto.attributeChangedCallback = function (name, oldValue, newValue) {
-    var internal
-    internal = v8Util.getHiddenValue(this, 'internal')
+    const internal = v8Util.getHiddenValue(this, 'internal')
     if (internal) {
       internal.handleBrowserPluginAttributeMutation(name, oldValue, newValue)
     }
@@ -285,21 +284,19 @@ const registerBrowserPluginElement = function () {
 }
 
 // Registers <webview> custom element.
-var registerWebViewElement = function () {
+const registerWebViewElement = function () {
   const proto = Object.create(HTMLObjectElement.prototype)
   proto.createdCallback = function () {
     return new WebViewImpl(this)
   }
   proto.attributeChangedCallback = function (name, oldValue, newValue) {
-    var internal
-    internal = v8Util.getHiddenValue(this, 'internal')
+    const internal = v8Util.getHiddenValue(this, 'internal')
     if (internal) {
       internal.handleWebviewAttributeMutation(name, oldValue, newValue)
     }
   }
   proto.detachedCallback = function () {
-    var internal
-    internal = v8Util.getHiddenValue(this, 'internal')
+    const internal = v8Util.getHiddenValue(this, 'internal')
     if (!internal) {
       return
     }
@@ -309,8 +306,7 @@ var registerWebViewElement = function () {
     internal.reset()
   }
   proto.attachedCallback = function () {
-    var internal, instance
-    internal = v8Util.getHiddenValue(this, 'internal')
+    const internal = v8Util.getHiddenValue(this, 'internal')
     if (!internal) {
       return
     }
@@ -318,7 +314,7 @@ var registerWebViewElement = function () {
       ipcRenderer.on('ELECTRON_RENDERER_WINDOW_VISIBILITY_CHANGE', internal.onVisibilityChanged)
       guestViewInternal.registerEvents(internal, internal.viewInstanceId)
       internal.elementAttached = true
-      instance = internal.attributes[webViewConstants.ATTRIBUTE_GUESTINSTANCE].getValue()
+      const instance = internal.attributes[webViewConstants.ATTRIBUTE_GUESTINSTANCE].getValue()
       if (instance) {
         internal.attachGuestInstance(instance)
       } else {