Implement new SyncAPI and convert Preferences to it.

chrome/browser/sync/glue/preference_data_type_controller.h

Index: chrome/browser/sync/glue/preference_data_type_controller.h
diff --git a/chrome/browser/sync/glue/preference_data_type_controller.h b/chrome/browser/sync/glue/preference_data_type_controller.h
index f126bdfa6b3ea06724aa9892831c28d84bb39e34..6f3d009ab685e69c1f25a2923d4dfc9dcfcffac9 100644
--- a/chrome/browser/sync/glue/preference_data_type_controller.h
+++ b/chrome/browser/sync/glue/preference_data_type_controller.h
@@ -23,12 +23,9 @@ class PreferenceDataTypeController : public FrontendDataTypeController {
 
   // FrontendDataTypeController implementation.
   virtual syncable::ModelType type() const OVERRIDE;
-  virtual AssociatorInterface* model_associator() const OVERRIDE;
-  virtual void set_model_associator(AssociatorInterface* associator) OVERRIDE;
 
  private:
   // FrontendDataTypeController implementations.
-  // TODO(zea): Remove this once everything uses the NewAssociatorInterface.
   virtual void CreateSyncComponents() OVERRIDE;
   virtual void RecordUnrecoverableError(
       const tracked_objects::Location& from_here,
@@ -36,11 +33,6 @@ class PreferenceDataTypeController : public FrontendDataTypeController {
   virtual void RecordAssociationTime(base::TimeDelta time) OVERRIDE;
   virtual void RecordStartFailure(StartResult result) OVERRIDE;
 
-  // Owned by pref service.
-  // TODO(zea): Make this a SyncableService once AssociatorInterface is
-  // deprecated.
-  AssociatorInterface* pref_sync_service_;
-
   DISALLOW_COPY_AND_ASSIGN(PreferenceDataTypeController);
 };