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

mojo/examples/media_viewer/media_viewer.cc

Index: mojo/examples/media_viewer/media_viewer.cc
diff --git a/mojo/examples/media_viewer/media_viewer.cc b/mojo/examples/media_viewer/media_viewer.cc
index c886710b15771005fb616c005bafe7252fdad888..82e8427dc4a413ebebd6a1cef03eafb025614dd3 100644
--- a/mojo/examples/media_viewer/media_viewer.cc
+++ b/mojo/examples/media_viewer/media_viewer.cc
@@ -11,7 +11,9 @@
 #include "mojo/examples/media_viewer/media_viewer.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_impl.h"
+#include "mojo/public/cpp/application/application_runner_chromium.h"
 #include "mojo/public/cpp/application/interface_factory_impl.h"
 #include "mojo/public/cpp/bindings/interface_impl.h"
 #include "mojo/services/public/cpp/view_manager/node.h"
@@ -383,10 +385,11 @@ void NavigatorImpl::Navigate(
 }
 
 }  // namespace examples
+}  // namespace mojo
 
-// static
-ApplicationDelegate* ApplicationDelegate::Create() {
-  return new examples::MediaViewer;
+extern "C" APPLICATION_EXPORT MojoResult CDECL MojoMain(
+    MojoHandle shell_handle) {
+  mojo::ApplicationRunnerChromium app;
+  app.take_delegate(make_scoped_delegate(new mojo::examples::MediaViewer));
+  return app.Run(shell_handle);
 }
-
-}  // namespace mojo