bindings: Fixes exposed JS APIs for platform apps.

extensions/renderer/resources/platform_app.js

Index: extensions/renderer/resources/platform_app.js
diff --git a/extensions/renderer/resources/platform_app.js b/extensions/renderer/resources/platform_app.js
index b34a303e04895cdc9b248f555682d6428ab6a281..1b50251e2bc60eba2774cdd9d715965c5a6ed464 100644
--- a/extensions/renderer/resources/platform_app.js
+++ b/extensions/renderer/resources/platform_app.js
@@ -157,10 +157,12 @@ disableGetters(window.history, 'history',
     ['back', 'forward', 'go', 'length', 'pushState', 'replaceState']);
 
 // Disable find.
+disableMethods(window, 'window', ['find']);
 disableMethods(Window.prototype, 'window', ['find']);
 
 // Disable modal dialogs. Shell windows disable these anyway, but it's nice to
 // warn.
+disableMethods(window, 'window', ['alert', 'confirm', 'prompt']);
 disableMethods(Window.prototype, 'window', ['alert', 'confirm', 'prompt']);
 
 // Disable window.*bar.
@@ -198,11 +200,12 @@ window.addEventListener('readystatechange', function(event) {
 }, true);
 
 // Disable onunload, onbeforeunload.
+disableSetters(window, 'window', ['onbeforeunload', 'onunload']);
 disableSetters(Window.prototype, 'window', ['onbeforeunload', 'onunload']);
-var windowAddEventListener = Window.prototype.addEventListener;
-Window.prototype.addEventListener = function(type) {
+var eventTargetAddEventListener = EventTarget.prototype.addEventListener;
+EventTarget.prototype.addEventListener = function(type) {
   if (type === 'unload' || type === 'beforeunload')
     generateDisabledMethodStub(type)();
   else
-    return $Function.apply(windowAddEventListener, window, arguments);
+    return $Function.apply(eventTargetAddEventListener, this, arguments);
 };