sync: Report GetUpdate triggers to the server

sync/engine/sync_scheduler.h

Index: sync/engine/sync_scheduler.h
diff --git a/sync/engine/sync_scheduler.h b/sync/engine/sync_scheduler.h
index b2ebbe3f0484862b9f0c50a6d82e54b61f7dee36..11915cf6b0394d84a82cbb81c85ac50ce8be580f 100644
--- a/sync/engine/sync_scheduler.h
+++ b/sync/engine/sync_scheduler.h
@@ -83,20 +83,23 @@ class SYNC_EXPORT_PRIVATE SyncScheduler
   // are cancelled.
   virtual void RequestStop(const base::Closure& callback) = 0;
 
-  // The meat and potatoes. Both of these methods will post a delayed task
+  // The meat and potatoes. All three of these methods will post a delayed task
   // to attempt the actual nudge (see ScheduleNudgeImpl).
   // NOTE: |desired_delay| is best-effort. If a nudge is already scheduled to
   // depart earlier than Now() + delay, the scheduler can and will prefer to
   // batch the two so that only one nudge is sent (at the earlier time). Also,
   // as always with delayed tasks and timers, it's possible the task gets run
   // any time after |desired_delay|.
-  virtual void ScheduleNudgeAsync(
+  virtual void ScheduleLocalNudge(
       const base::TimeDelta& desired_delay,
-      NudgeSource source,
       ModelTypeSet types,
       const tracked_objects::Location& nudge_location) = 0;
-  virtual void ScheduleNudgeWithStatesAsync(
-      const base::TimeDelta& desired_delay, NudgeSource source,
+  virtual void ScheduleLocalRefreshRequest(

[tim (not reviewing), 2013/05/07 20:34:13]

We should update the comment here to introduce the 'LocalRefreshRequest' and
'InvalidationNudge' concepts.

[rlarocque, 2013/05/07 21:50:57]

Done.

+      const base::TimeDelta& desired_delay,
+      ModelTypeSet types,
+      const tracked_objects::Location& nudge_location) = 0;
+  virtual void ScheduleInvalidationNudge(
+      const base::TimeDelta& desired_delay,
       const ModelTypeInvalidationMap& invalidation_map,
       const tracked_objects::Location& nudge_location) = 0;