GuestView: Move lifetime management out of content

extensions/renderer/resources/web_view_events.js

Index: extensions/renderer/resources/web_view_events.js
diff --git a/extensions/renderer/resources/web_view_events.js b/extensions/renderer/resources/web_view_events.js
index f02069bd52bbde4b6ac1e40f92ea9ce26f3fdc5e..c73a1f61fd20041d8f92b8226219bc3b3ea76ef7 100644
--- a/extensions/renderer/resources/web_view_events.js
+++ b/extensions/renderer/resources/web_view_events.js
@@ -184,7 +184,6 @@ function WebViewEvents(webViewInternal, viewInstanceId) {
 // Sets up events.
 WebViewEvents.prototype.setup = function() {
   this.setupFrameNameChangedEvent();
-  this.setupPluginDestroyedEvent();
   this.setupWebRequestEvents();
   this.webViewInternal.setupExperimentalContextMenus();
 
@@ -200,12 +199,6 @@ WebViewEvents.prototype.setupFrameNameChangedEvent = function() {
   }.bind(this), {instanceId: this.viewInstanceId});
 };
 
-WebViewEvents.prototype.setupPluginDestroyedEvent = function() {
-  PluginDestroyedEvent.addListener(function(e) {
-    this.webViewInternal.onPluginDestroyed();
-  }.bind(this), {instanceId: this.viewInstanceId});
-};
-
 WebViewEvents.prototype.setupWebRequestEvents = function() {
   var request = {};
   var createWebRequestEvent = function(webRequestEvent) {