Implement autosizing for <extensionoptions>

chrome/renderer/resources/extensions/extension_options_events.js

Index: chrome/renderer/resources/extensions/extension_options_events.js
diff --git a/chrome/renderer/resources/extensions/extension_options_events.js b/chrome/renderer/resources/extensions/extension_options_events.js
index a93f05ca5edf12d76cf5a9dbe9c0c59c40de46b5..c842b08ed62b9b1780c5d97550454bfdf1c8791a 100644
--- a/chrome/renderer/resources/extensions/extension_options_events.js
+++ b/chrome/renderer/resources/extensions/extension_options_events.js
@@ -14,6 +14,13 @@ var EXTENSION_OPTIONS_EVENTS = {
     evt: CreateEvent('extensionOptionsInternal.onLoad'),
     fields: []
   },
+  'sizechanged': {
+    evt: CreateEvent('extensionOptionsInternal.onSizeChanged'),
+    customHandler: function(handler, event, webViewEvent) {
+      handler.handleSizeChangedEvent(event, webViewEvent);
+    },
+    fields:['width', 'height']
+  }
 }
 
 /**
@@ -54,5 +61,12 @@ ExtensionOptionsEvents.prototype.setupEvent = function(name, info) {
   this.extensionOptionsInternal.setupEventProperty(name);
 };
 
+ExtensionOptionsEvents.prototype.handleSizeChangedEvent = function(
+    event, extensionOptionsEvent) {
+  this.extensionOptionsInternal.onSizeChanged(extensionOptionsEvent.width,
+                                              extensionOptionsEvent.height);
+  this.extensionOptionsInternal.dispatchEvent(extensionOptionsEvent);
+}
+
 exports.ExtensionOptionsEvents = ExtensionOptionsEvents;
 exports.CreateEvent = CreateEvent;