Introduce internal::ServiceRegistry to prepare for ServiceProvider split.

mojo/public/cpp/application/lib/service_connector.cc

Index: mojo/public/cpp/application/lib/service_connector.cc
diff --git a/mojo/public/cpp/application/lib/service_connector.cc b/mojo/public/cpp/application/lib/service_connector.cc
index 3c53be011b900944a93884671365c60a83845532..5cc4421b7aaa9f4b930c86abc08d4377f3ae7e7d 100644
--- a/mojo/public/cpp/application/lib/service_connector.cc
+++ b/mojo/public/cpp/application/lib/service_connector.cc
@@ -7,16 +7,11 @@
 namespace mojo {
 namespace internal {
 
-ServiceConnectorBase::Owner::Owner() {}
-
-ServiceConnectorBase::Owner::Owner(
-    ScopedMessagePipeHandle service_provider_handle) {
-  service_provider_.Bind(service_provider_handle.Pass());
-  service_provider_.set_client(this);
+ServiceConnectorBase::ServiceConnectorBase(const std::string& name)
+    : name_(name),
+      registry_(NULL) {
 }
 
-ServiceConnectorBase::Owner::~Owner() {}
-
 ServiceConnectorBase::~ServiceConnectorBase() {}
 
 }  // namespace internal