Split Mandoline-specific components out of mojo:core_services.

mandoline/services/core_services/core_services_application_delegate.cc

Index: mandoline/services/core_services/core_services_application_delegate.cc
diff --git a/mandoline/services/core_services/core_services_application_delegate.cc b/mandoline/services/core_services/core_services_application_delegate.cc
index 7c970f294699b066d430a203200bd9858c968ccc..f7fd32a3878d2c5b7676b898d543fe3c1d5057b0 100644
--- a/mandoline/services/core_services/core_services_application_delegate.cc
+++ b/mandoline/services/core_services/core_services_application_delegate.cc
@@ -136,9 +136,6 @@ void CoreServicesApplicationDelegate::StartApplication(
   } else if (url == "mojo://web_view/") {
     delegate.reset(new web_view::WebViewApplicationDelegate);
   } else {
-#if defined(USE_AURA)
-    delegate = CreateApplicationDelegateAura(url);
-#endif
 #if !defined(OS_ANDROID)
     if (!delegate)
       delegate = CreateApplicationDelegateNotAndroid(url);