[Sync] Clean up sync logging

chrome/browser/sync/engine/syncer.cc

Index: chrome/browser/sync/engine/syncer.cc
diff --git a/chrome/browser/sync/engine/syncer.cc b/chrome/browser/sync/engine/syncer.cc
index e23c40ba60fdf9bba69163b82ebaf75be44d1b28..6352701eeac0b89a73bc1200ac072bdfc3101e0d 100644
--- a/chrome/browser/sync/engine/syncer.cc
+++ b/chrome/browser/sync/engine/syncer.cc
@@ -268,12 +268,20 @@ void Syncer::SyncShare(sessions::SyncSession* session,
       default:
         LOG(ERROR) << "Unknown command: " << current_step;
     }
+    VLOG(2) << "last step: " << last_step << ", current step: "
+            << current_step << ", next step: "
+            << next_step << ", snapshot: "
+            << session->TakeSnapshot().ToString();
     if (last_step == current_step)
       break;
     current_step = next_step;
   }
 
   VLOG(1) << "Syncer End";
+  VLOG(2) << "last step: " << last_step << ", current step: "
+          << current_step << ", next step: "
+          << next_step << ", snapshot: "
+          << session->TakeSnapshot().ToString();
   SyncerEndCommand syncer_end_command;
   syncer_end_command.Execute(session);
   return;