mojo: first take on removing mojo_main_{chromium,standalone}.

mojo/examples/aura_demo/aura_demo.cc

Index: mojo/examples/aura_demo/aura_demo.cc
diff --git a/mojo/examples/aura_demo/aura_demo.cc b/mojo/examples/aura_demo/aura_demo.cc
index 97b530c1c7e4310a653435372ff0181bee9a6513..e272bf492916ed784b4fff3bdd6acc6797eda078 100644
--- a/mojo/examples/aura_demo/aura_demo.cc
+++ b/mojo/examples/aura_demo/aura_demo.cc
@@ -12,6 +12,9 @@
 #include "mojo/aura/window_tree_host_mojo_delegate.h"
 #include "mojo/public/cpp/application/application_connection.h"
 #include "mojo/public/cpp/application/application_delegate.h"
+#include "mojo/public/cpp/application/application_export.h"
+#include "mojo/public/cpp/application/application_impl.h"
+#include "mojo/public/cpp/application/application_runner_chromium.h"
 #include "mojo/public/cpp/system/core.h"
 #include "mojo/services/public/cpp/view_manager/node.h"
 #include "mojo/services/public/cpp/view_manager/view.h"
@@ -200,10 +203,11 @@ class AuraDemo : public ApplicationDelegate,
 };
 
 }  // namespace examples
+}  // namespace mojo
 
-// static
-ApplicationDelegate* ApplicationDelegate::Create() {
-  return new examples::AuraDemo();
+extern "C" APPLICATION_EXPORT MojoResult CDECL MojoMain(
+    MojoHandle shell_handle) {
+  mojo::ApplicationRunnerChromium app;
+  app.take_delegate(make_scoped_delegate(new mojo::examples::AuraDemo()));
+  return app.Run(shell_handle);
 }
-
-}  // namespace mojo