Revert of [Sync] Make directory types registration explicit in ModelTypeRegistry

components/sync/engine/fake_sync_manager.cc

Index: components/sync/engine/fake_sync_manager.cc
diff --git a/components/sync/engine/fake_sync_manager.cc b/components/sync/engine/fake_sync_manager.cc
index e9f9ce8b1f5556b8a771eb243c0a0d3099a77054..b97e933697889d95df158e4eca59f8539feb91b0 100644
--- a/components/sync/engine/fake_sync_manager.cc
+++ b/components/sync/engine/fake_sync_manager.cc
@@ -17,8 +17,10 @@
 #include "base/threading/thread_task_runner_handle.h"
 #include "components/sync/base/weak_handle.h"
 #include "components/sync/engine/engine_components_factory.h"
+#include "components/sync/engine/fake_model_type_connector.h"
 #include "components/sync/engine/net/http_post_provider_factory.h"
 #include "components/sync/syncable/directory.h"
+#include "components/sync/test/fake_sync_encryption_handler.h"
 
 class GURL;
 
@@ -31,7 +33,9 @@
       progress_marker_types_(progress_marker_types),
       configure_fail_types_(configure_fail_types),
       last_configure_reason_(CONFIGURE_REASON_UNKNOWN),
-      num_invalidations_received_(0) {}
+      num_invalidations_received_(0) {
+  fake_encryption_handler_ = base::MakeUnique<FakeSyncEncryptionHandler>();
+}
 
 FakeSyncManager::~FakeSyncManager() {}
 
@@ -51,6 +55,12 @@
   ModelTypeSet downloaded_types = downloaded_types_;
   downloaded_types_.Clear();
   return downloaded_types;
+}
+
+ModelTypeSet FakeSyncManager::GetAndResetEnabledTypes() {
+  ModelTypeSet enabled_types = enabled_types_;
+  enabled_types_.Clear();
+  return enabled_types;
 }
 
 ConfigureReason FakeSyncManager::GetAndResetConfigureReason() {
@@ -134,20 +144,20 @@
   NOTIMPLEMENTED();
 }
 
-void FakeSyncManager::StartSyncingNormally(base::Time last_poll_time) {
-  // Do nothing.
-}
-
-void FakeSyncManager::StartConfiguration() {
+void FakeSyncManager::StartSyncingNormally(
+    const ModelSafeRoutingInfo& routing_info,
+    base::Time last_poll_time) {
   // Do nothing.
 }
 
 void FakeSyncManager::ConfigureSyncer(
     ConfigureReason reason,
     ModelTypeSet to_download,
+    const ModelSafeRoutingInfo& new_routing_info,
     const base::Closure& ready_task,
     const base::Closure& retry_task) {
   last_configure_reason_ = reason;
+  enabled_types_ = GetRoutingInfoTypes(new_routing_info);
   ModelTypeSet success_types = to_download;
   success_types.RemoveAll(configure_fail_types_);
 
@@ -198,10 +208,6 @@
   return test_user_share_.user_share();
 }
 
-ModelTypeConnector* FakeSyncManager::GetModelTypeConnector() {
-  return &fake_model_type_connector_;
-}
-
 std::unique_ptr<ModelTypeConnector>
 FakeSyncManager::GetModelTypeConnectorProxy() {
   return base::MakeUnique<FakeModelTypeConnector>();
@@ -221,7 +227,7 @@
 }
 
 SyncEncryptionHandler* FakeSyncManager::GetEncryptionHandler() {
-  return &fake_encryption_handler_;
+  return fake_encryption_handler_.get();
 }
 
 std::vector<std::unique_ptr<ProtocolEvent>>