Mojo: Refactor URLLoader interface.

mojo/shell/in_process_dynamic_service_runner.cc

Index: mojo/shell/in_process_dynamic_service_runner.cc
diff --git a/mojo/shell/in_process_dynamic_service_runner.cc b/mojo/shell/in_process_dynamic_service_runner.cc
index 6bcaa5c67a828b5a0f3a9cfb31f1579a68eeec01..0d80d4096acdc13c8e526104d4604adff2405b40 100644
--- a/mojo/shell/in_process_dynamic_service_runner.cc
+++ b/mojo/shell/in_process_dynamic_service_runner.cc
@@ -74,9 +74,12 @@ void InProcessDynamicServiceRunner::Run() {
         break;
       }
     } else {
+      // In the component build, Mojo Apps link against mojo_system_impl.
+#if !defined(COMPONENT_BUILD)
       // Strictly speaking this is not required, but it's very unusual to have
       // an app that doesn't require the basic system library.
       LOG(WARNING) << "MojoSetSystemThunks not found in app library";
+#endif
     }
 
     typedef MojoResult (*MojoMainFunction)(MojoHandle);