Take 2 at browser_sync::ExtensionsActivityMonitor....

chrome/common/notification_type.h

Index: chrome/common/notification_type.h
===================================================================
--- chrome/common/notification_type.h	(revision 30303)
+++ chrome/common/notification_type.h	(working copy)
@@ -612,11 +612,6 @@
     // are all source and no details.
     SESSION_END,
 
-    // Personalization ---------------------------------------------------------
-
-    PERSONALIZATION,
-    PERSONALIZATION_CREATED,
-
     // Privacy blacklists ------------------------------------------------------
 
     // Sent when a privacy blacklist path provider changes the list of its
@@ -714,6 +709,11 @@
     EXTENSION_TEST_PASSED,
     EXTENSION_TEST_FAILED,
 
+    // Sent when an bookmarks extensions API function was successfully invoked.
+    // The source is the id of the extension that invoked the function, and the
+    // details are a pointer to the const BookmarksFunction in question.
+    EXTENSION_BOOKMARKS_API_INVOKED,
+
     // Privacy Blacklist -------------------------------------------------------
 
     // Sent by the resource dispatcher host when a resource is blocked.