Revise InterfaceRegistry API to support filtering interfaces @ Bind() time.

content/child/child_thread_impl.cc

Index: content/child/child_thread_impl.cc
diff --git a/content/child/child_thread_impl.cc b/content/child/child_thread_impl.cc
index e166b19fa9c482f7dcd271540b6e71976f831819..45b0ec6d299da122f6ce29c251dfa1484294973f 100644
--- a/content/child/child_thread_impl.cc
+++ b/content/child/child_thread_impl.cc
@@ -656,8 +656,10 @@ ServiceManagerConnection* ChildThreadImpl::GetServiceManagerConnection() {
 }
 
 service_manager::InterfaceRegistry* ChildThreadImpl::GetInterfaceRegistry() {
-  if (!interface_registry_.get())
-    interface_registry_.reset(new service_manager::InterfaceRegistry);
+  if (!interface_registry_.get()) {
+    interface_registry_ = base::MakeUnique<service_manager::InterfaceRegistry>(
+        service_manager::Identity(), service_manager::InterfaceProviderSpec());
+  }
   return interface_registry_.get();
 }