Changes to content/ to facilitate new zoom extension API

content/public/browser/notification_types.h

Index: content/public/browser/notification_types.h
diff --git a/content/public/browser/notification_types.h b/content/public/browser/notification_types.h
index a2849893f5e4c1957968f6e2205f86c050759599..81b18b4391176c4102ff2f04124469db14270b7d 100644
--- a/content/public/browser/notification_types.h
+++ b/content/public/browser/notification_types.h
@@ -128,6 +128,11 @@ enum NotificationType {
   // WebContentsObserver::WebContentsDestroyed()
   NOTIFICATION_WEB_CONTENTS_DISCONNECTED,
 
+  // This notification is sent when a WebContents no longer needs a temporary
+  // zoom level maintained for it. This happens when the Webcontents
+  // returns to the default zoom mode.
+  NOTIFICATION_WEB_CONTENTS_NO_TEMPORARY_ZOOM_LEVEL,
+
   // This notification is sent after WebContents' title is updated. The source
   // is a Source<WebContents> with a pointer to the WebContents. The details
   // is a std::pair<NavigationEntry*, bool> that contains more information.
@@ -141,6 +146,9 @@ enum NotificationType {
   // DEPRECATED: Use WebContentsObserver::WebContentsDestroyed()
   NOTIFICATION_WEB_CONTENTS_DESTROYED,
 
+  // This notification is sent when a WebContents's zoom level is being changed.
+  NOTIFICATION_WEB_CONTENTS_ZOOM_CHANGE,
+
   // A RenderViewHost was created for a WebContents. The source is the
   // associated WebContents, and the details is the RenderViewHost
   // pointer.