Implement new SyncAPI and convert Preferences to it.

chrome/browser/sync/glue/preference_data_type_controller.cc

Index: chrome/browser/sync/glue/preference_data_type_controller.cc
diff --git a/chrome/browser/sync/glue/preference_data_type_controller.cc b/chrome/browser/sync/glue/preference_data_type_controller.cc
index 5285b92419472db8153398bd3c7a5e3d211c3c44..0e52b99b8a895bdc24254db6d0c9e5e7e559da58 100644
--- a/chrome/browser/sync/glue/preference_data_type_controller.cc
+++ b/chrome/browser/sync/glue/preference_data_type_controller.cc
@@ -5,11 +5,10 @@
 #include "chrome/browser/sync/glue/preference_data_type_controller.h"
 
 #include "base/metrics/histogram.h"
-#include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/sync/api/syncable_service.h"
 #include "chrome/browser/sync/glue/generic_change_processor.h"
 #include "chrome/browser/sync/profile_sync_factory.h"
-#include "chrome/browser/sync/syncable_service.h"
 
 namespace browser_sync {
 
@@ -19,12 +18,10 @@ PreferenceDataTypeController::PreferenceDataTypeController(
     ProfileSyncService* sync_service)
     : FrontendDataTypeController(profile_sync_factory,
                                  profile,
-                                 sync_service),
-      pref_sync_service_(NULL) {
+                                 sync_service) {
 }
 
 PreferenceDataTypeController::~PreferenceDataTypeController() {
-  pref_sync_service_ = NULL;
 }
 
 syncable::ModelType PreferenceDataTypeController::type() const {
@@ -37,18 +34,6 @@ void PreferenceDataTypeController::CreateSyncComponents() {
                                                             this);
   set_model_associator(sync_components.model_associator);
   set_change_processor(sync_components.change_processor);
-  reinterpret_cast<SyncableService*>(model_associator())->
-      SetupSync(sync_service_,
-                reinterpret_cast<GenericChangeProcessor*>(change_processor()));
-}
-
-AssociatorInterface* PreferenceDataTypeController::model_associator() const {
-  return pref_sync_service_;
-}
-
-void PreferenceDataTypeController::set_model_associator(
-    AssociatorInterface* associator) {
-  pref_sync_service_ = associator;
 }
 
 void PreferenceDataTypeController::RecordUnrecoverableError(