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

mojo/examples/echo/echo_service.cc

Index: mojo/examples/echo/echo_service.cc
diff --git a/mojo/examples/echo/echo_service.cc b/mojo/examples/echo/echo_service.cc
index 9d4bdd3c11d15d5acc86d2d36e2ff99ba186fcab..ae1d2c3cf65d95b552fe36c4a7ecbd71e656c6c7 100644
--- a/mojo/examples/echo/echo_service.cc
+++ b/mojo/examples/echo/echo_service.cc
@@ -5,6 +5,8 @@
 #include "mojo/examples/echo/echo_service.mojom.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_runner.h"
 #include "mojo/public/cpp/application/interface_factory_impl.h"
 
 namespace mojo {
@@ -32,10 +34,10 @@ class EchoServiceDelegate : public ApplicationDelegate {
 };
 
 }  // namespace examples
+}  // namespace mojo
 
-// static
-ApplicationDelegate* ApplicationDelegate::Create() {
-  return new examples::EchoServiceDelegate();
+extern "C" APPLICATION_EXPORT MojoResult CDECL MojoMain(
+    MojoHandle shell_handle) {
+  return mojo::ApplicationRunner(
+      new mojo::examples::EchoServiceDelegate).Run(shell_handle);
 }
-
-}  // namespace mojo