sync: Support nudges from non-blocking sync types

sync/internal_api/sync_manager_impl.cc

Index: sync/internal_api/sync_manager_impl.cc
diff --git a/sync/internal_api/sync_manager_impl.cc b/sync/internal_api/sync_manager_impl.cc
index 0e3caf3e23f73566e817af1f0bcfd132152d50a8..d219af6b9c9d835ead31587cbc82d1a4a9d88930 100644
--- a/sync/internal_api/sync_manager_impl.cc
+++ b/sync/internal_api/sync_manager_impl.cc
@@ -394,7 +394,7 @@ void SyncManagerImpl::Init(
   DVLOG(1) << "Setting invalidator client ID: " << invalidator_client_id;
   allstatus_.SetInvalidatorClientId(invalidator_client_id);
 
-  model_type_registry_.reset(new ModelTypeRegistry(workers, directory()));
+  model_type_registry_.reset(new ModelTypeRegistry(workers, directory(), this));
 
   // Bind the SyncContext WeakPtr to this thread.  This helps us crash earlier
   // if the pointer is misused in debug mode.
@@ -898,6 +898,19 @@ void SyncManagerImpl::RequestNudgeForDataTypes(
                                  nudge_location);
 }
 
+void SyncManagerImpl::NudgeForInitialDownload(syncer::ModelType type) {
+  // TODO(rlarocque): Initial downloads should have a separate nudge type.
+  RefreshTypes(ModelTypeSet(type));
+}
+
+void SyncManagerImpl::NudgeForCommit(syncer::ModelType type) {
+  RequestNudgeForDataTypes(FROM_HERE, ModelTypeSet(type));

[pavely, 2014/07/09 23:13:18]

Could you check thread either here or in RequestNudgeForDataTypes?

[rlarocque, 2014/07/10 00:12:29]

Done.

+}
+
+void SyncManagerImpl::NudgeForRefresh(syncer::ModelType type) {
+  RefreshTypes(ModelTypeSet(type));
+}
+
 void SyncManagerImpl::OnSyncCycleEvent(const SyncCycleEvent& event) {
   DCHECK(thread_checker_.CalledOnValidThread());
   // Only send an event if this is due to a cycle ending and this cycle