[Sync] Make syncer commands avoid posting tasks on threads with no work to do

chrome/browser/sync/sessions/status_controller.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync/sessions/status_controller.h"
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "chrome/browser/sync/protocol/sync_protocol_error.h"
@@ skipping 44 matching lines @@
       true, group_restriction_)->conflict_progress;
 }
 
 const ConflictProgress* StatusController::GetUnrestrictedConflictProgress(
     ModelSafeGroup group) const {
   const PerModelSafeGroupState* state =
       GetModelSafeGroupState(false, group);
   return state ? &state->conflict_progress : NULL;
 }
 
+ConflictProgress*
+    StatusController::GetUnrestrictedMutableConflictProgressForTest(
+        ModelSafeGroup group) {
+  return &GetOrCreateModelSafeGroupState(false, group)->conflict_progress;
+}
+
 const UpdateProgress* StatusController::GetUnrestrictedUpdateProgress(
     ModelSafeGroup group) const {
   const PerModelSafeGroupState* state =
       GetModelSafeGroupState(false, group);
   return state ? &state->update_progress : NULL;
 }
 
+UpdateProgress*
+    StatusController::GetUnrestrictedMutableUpdateProgressForTest(
+        ModelSafeGroup group) {
+  return &GetOrCreateModelSafeGroupState(false, group)->update_progress;
+}
+
 const PerModelSafeGroupState* StatusController::GetModelSafeGroupState(
     bool restrict, ModelSafeGroup group) const {
   DCHECK_EQ(restrict, group_restriction_in_effect_);
   std::map<ModelSafeGroup, PerModelSafeGroupState*>::const_iterator it =
       per_model_group_.find(group);
   return (it == per_model_group_.end()) ? NULL : it->second;
 }
 
 PerModelSafeGroupState* StatusController::GetOrCreateModelSafeGroupState(
     bool restrict, ModelSafeGroup group) {
@@ skipping 208 matching lines @@
 void StatusController::set_debug_info_sent() {
   shared_.control_params.debug_info_sent = true;
 }
 
 bool StatusController::debug_info_sent() const {
   return shared_.control_params.debug_info_sent;
 }
 
 }  // namespace sessions
 }  // namespace browser_sync