sync: Introduce control data types

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..e9725dec8e24741453569fd9b7d7d82a89979970 100644
--- a/chrome/browser/sync/glue/sync_backend_registrar.cc
+++ b/chrome/browser/sync/glue/sync_backend_registrar.cc
@@ -19,6 +19,7 @@
 #include "chrome/browser/sync/glue/password_model_worker.h"
 #include "chrome/browser/sync/glue/ui_model_worker.h"
 #include "content/public/browser/browser_thread.h"
+#include "sync/internal_api/public/engine/control_model_worker.h"
 #include "sync/internal_api/public/engine/passive_model_worker.h"
 
 using content::BrowserThread;
@@ -33,6 +34,8 @@ bool IsOnThreadForGroup(syncer::ModelSafeGroup group) {
   switch (group) {
     case syncer::GROUP_PASSIVE:
       return false;
+    case syncer::GROUP_CONTROL:
+      return false;
     case syncer::GROUP_UI:
       return BrowserThread::CurrentlyOn(BrowserThread::UI);
     case syncer::GROUP_DB:
@@ -68,6 +71,7 @@ SyncBackendRegistrar::SyncBackendRegistrar(
   workers_[syncer::GROUP_FILE] = new FileModelWorker();
   workers_[syncer::GROUP_UI] = ui_worker_;
   workers_[syncer::GROUP_PASSIVE] = new syncer::PassiveModelWorker(sync_loop_);
+  workers_[syncer::GROUP_CONTROL] = new syncer::ControlModelWorker(sync_loop_);
 
   HistoryService* history_service =
       HistoryServiceFactory::GetForProfile(profile, Profile::IMPLICIT_ACCESS);
@@ -95,7 +99,11 @@ void SyncBackendRegistrar::SetInitialTypes(syncer::ModelTypeSet initial_types) {
   // return correct results.
   for (syncer::ModelTypeSet::Iterator it = initial_types.First();
        it.Good(); it.Inc()) {
-    routing_info_[it.Get()] = syncer::GROUP_PASSIVE;
+    if (IsControlType(it.Get())) {
+      routing_info_[it.Get()] = syncer::GROUP_CONTROL;
+    } else {
+      routing_info_[it.Get()] = syncer::GROUP_PASSIVE;
+    }
   }
 
   if (!workers_.count(syncer::GROUP_HISTORY)) {
@@ -145,7 +153,11 @@ syncer::ModelTypeSet SyncBackendRegistrar::ConfigureDataTypes(
     // Add a newly specified data type as syncer::GROUP_PASSIVE into the
     // routing_info, if it does not already exist.
     if (routing_info_.count(it.Get()) == 0) {
-      routing_info_[it.Get()] = syncer::GROUP_PASSIVE;
+      if (IsControlType(it.Get())) {
+        routing_info_[it.Get()] = syncer::GROUP_CONTROL;
+      } else {
+        routing_info_[it.Get()] = syncer::GROUP_PASSIVE;
+      }
       newly_added_types.Put(it.Get());
     }
   }