[Sync] Add comment for SyncBackendHost::OnBackendInitialized

chrome/browser/sync/glue/sync_backend_host.h

Index: chrome/browser/sync/glue/sync_backend_host.h
diff --git a/chrome/browser/sync/glue/sync_backend_host.h b/chrome/browser/sync/glue/sync_backend_host.h
index 1f7d8c163e092d1dea31918b8b9bed36e684787d..fcd05496d1f62cc2f8ce6ac96a02b8e0b916a5dc 100644
--- a/chrome/browser/sync/glue/sync_backend_host.h
+++ b/chrome/browser/sync/glue/sync_backend_host.h
@@ -58,9 +58,12 @@ class SyncFrontend {
  public:
   SyncFrontend() {}
 
-  // The backend has completed initialization and it is now ready to accept and
-  // process changes.  If success is false, initialization wasn't able to be
-  // completed and should be retried.
+  // The backend has completed initialization and it is now ready to
+  // accept and process changes.  If success is false, initialization
+  // wasn't able to be completed and should be retried.
+  //
+  // |js_backend| is what about:sync interacts with; it's different
+  // from the 'Backend' in 'OnBackendInitialized' (unfortunately).

[tim (not reviewing), 2011/08/11 21:43:19]

is |js_backend| only provided on |success| = true?

[akalin, 2011/08/12 18:24:26]

It's initialized only on success = true.  Added comment.

   virtual void OnBackendInitialized(
       const WeakHandle<JsBackend>& js_backend, bool success) = 0;