Moving notification types which are chrome specific to a new header file chrome_notification_types.h.
This file lives in chrome\common. The chrome specific notifications start from NOTIFICATION_CONTENT_END
which defines the end of the enum used by content to define notification types. The notificaton_type.h file
in content\common has been renamed to content_notification_types.h

BUG=76698
Review URL: http://codereview.chromium.org/7327007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@91972 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/tab_contents/thumbnail_generator.h b/chrome/browser/tab_contents/thumbnail_generator.h
index 23a9361..0c0e588 100644
--- a/chrome/browser/tab_contents/thumbnail_generator.h
+++ b/chrome/browser/tab_contents/thumbnail_generator.h
@@ -134,7 +134,7 @@
       const gfx::Size& size);
 
   // NotificationObserver interface.
-  virtual void Observe(NotificationType type,
+  virtual void Observe(int type,
                        const NotificationSource& source,
                        const NotificationDetails& details);