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..4c7786518c03ca984f5856f2f8160ebd4c747e8b 100644
--- a/services/ui/launcher/launcher.mojom
+++ b/services/ui/launcher/launcher.mojom
@@ -4,9 +4,14 @@
 
 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);
+  LaunchOnViewport(mojo.NativeViewport viewport,

[ppi, 2016/05/30 09:21:00]

Should we annotate this method with a comment along the lines of
https://github.com/domokit/mojo/commit/8d66e0d091ffaf332a1ea75d6c37232ad9f3ec36
?

[qsr, 2016/05/30 09:37:57]

Done.

+                   mojo.ui.ViewProvider view_provider);
 };