Sync Promo: Add more UMA metrics.

chrome/common/extensions/extension_constants.h

Index: chrome/common/extensions/extension_constants.h
diff --git a/chrome/common/extensions/extension_constants.h b/chrome/common/extensions/extension_constants.h
index 27febbe79bc9b52c688b14acb114d90374040204..d75c46b174f836ac89f186513734b883d1425781 100644
--- a/chrome/common/extensions/extension_constants.h
+++ b/chrome/common/extensions/extension_constants.h
@@ -454,6 +454,7 @@ namespace extension_misc {
     UNLOAD_REASON_TERMINATE,  // Extension has terminated.
   };
 
+  // TODO(dbeam): Is this the right place for these values?

[Evan Stade, 2011/11/15 17:45:19]

nope

[Dan Beam, 2011/11/15 18:37:13]

Done. (moved to sync_promo_handler.h)

[Dan Beam, 2011/11/15 18:38:05]

Sorry, sync_promo_handler.cc rather.

   // User actions on the sync promo (aka "Sign in to Chrome").
   enum SyncPromoBuckets {
     SYNC_PROMO_VIEWED,
@@ -469,6 +470,7 @@ namespace extension_misc {
     SYNC_PROMO_CONFIRMED_AFTER_SIGN_IN,
     SYNC_PROMO_CLOSED_TAB,
     SYNC_PROMO_CLOSED_WINDOW,
+    SYNC_PROMO_LEFT_DURING_THROBBER,
     SYNC_PROMO_BUCKET_BOUNDARY,
     SYNC_PROMO_FIRST_VALID_JS_ACTION = SYNC_PROMO_LEARN_MORE_CLICKED,
     SYNC_PROMO_LAST_VALID_JS_ACTION = SYNC_PROMO_CONFIRMED_AFTER_SIGN_IN,