NOT FOR COMMIT: Add DeviceInfo type and ChangeProcessor

chrome/browser/sync/glue/sync_backend_registrar.cc

Index: chrome/browser/sync/glue/sync_backend_registrar.cc
diff --git a/chrome/browser/sync/glue/sync_backend_registrar.cc b/chrome/browser/sync/glue/sync_backend_registrar.cc
index 4cd91b7adb93ac4b2a099866325c7c9a98c39c48..4f2773e904430392f643b887c64f38b7371ff11f 100644
--- a/chrome/browser/sync/glue/sync_backend_registrar.cc
+++ b/chrome/browser/sync/glue/sync_backend_registrar.cc
@@ -29,10 +29,10 @@ namespace {
 
 // Returns true if the current thread is the native thread for the
 // given group (or if it is undeterminable).
-bool IsOnThreadForGroup(syncer::ModelSafeGroup group) {
+bool IsOnThreadForGroup(syncer::ModelType type, syncer::ModelSafeGroup group) {
   switch (group) {
     case syncer::GROUP_PASSIVE:
-      return false;
+      return IsControlType(type);
     case syncer::GROUP_UI:
       return BrowserThread::CurrentlyOn(BrowserThread::UI);
     case syncer::GROUP_DB:
@@ -184,7 +184,7 @@ void SyncBackendRegistrar::ActivateDataType(
     syncer::ModelSafeGroup group,
     ChangeProcessor* change_processor,
     syncer::UserShare* user_share) {
-  CHECK(IsOnThreadForGroup(group));
+  CHECK(IsOnThreadForGroup(type, group));
   base::AutoLock lock(lock_);
   // Ensure that the given data type is in the PASSIVE group.
   syncer::ModelSafeRoutingInfo::iterator i = routing_info_.find(type);
@@ -204,7 +204,7 @@ void SyncBackendRegistrar::ActivateDataType(
 }
 
 void SyncBackendRegistrar::DeactivateDataType(syncer::ModelType type) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI) || IsControlType(type));
   base::AutoLock lock(lock_);
   ChangeProcessor* change_processor = GetProcessorUnsafe(type);
   if (change_processor)
@@ -294,7 +294,8 @@ ChangeProcessor* SyncBackendRegistrar::GetProcessorUnsafe(
 bool SyncBackendRegistrar::IsCurrentThreadSafeForModel(
     syncer::ModelType model_type) const {
   lock_.AssertAcquired();
-  return IsOnThreadForGroup(GetGroupForModelType(model_type, routing_info_));
+  return IsOnThreadForGroup(model_type,
+                            GetGroupForModelType(model_type, routing_info_));
 }
 
 }  // namespace browser_sync