Update launcher API.

services/ui/launcher/launcher.mojom

Index: services/ui/launcher/launcher.mojom
diff --git a/services/ui/launcher/launcher.mojom b/services/ui/launcher/launcher.mojom
index 23037329a661065616a5ed1c357838e3dcb81589..ae25ad0a716d2e43210f23df381ea29a25a9bc01 100644
--- a/services/ui/launcher/launcher.mojom
+++ b/services/ui/launcher/launcher.mojom
@@ -4,9 +4,16 @@
 
 module launcher;
 
+import "mojo/services/native_viewport/interfaces/native_viewport.mojom";
+import "mojo/services/ui/views/interfaces/view_provider.mojom";
+
 // Private interface for the shell. Allows the shell to start an ui
 // application.
 [ServiceName="launcher::Launcher"]
 interface Launcher {
   Launch(string application_url);
+  // Displays the view provided by |view_provider| in the provided |viewport|.
+  // Used by https://manganese.googlesource.com/.
+  LaunchOnViewport(mojo.NativeViewport viewport,
+                   mojo.ui.ViewProvider view_provider);
 };