Simplify mojo_shell since it's now only used for Mandoline.

mojo/services/kiosk_wm/BUILD.gn

Index: mojo/services/kiosk_wm/BUILD.gn
diff --git a/mojo/services/kiosk_wm/BUILD.gn b/mojo/services/kiosk_wm/BUILD.gn
index 99c25f0d0eb1f6cc8116dea0449ac00a768e6930..cf26cd34b554ecc03f8f458c114bf67582481378 100644
--- a/mojo/services/kiosk_wm/BUILD.gn
+++ b/mojo/services/kiosk_wm/BUILD.gn
@@ -5,7 +5,9 @@
 import("//third_party/mojo/src/mojo/public/mojo_application.gni")
 import("$mojo_sdk_root/mojo/public/tools/bindings/mojom.gni")
 
-mojo_native_application("kiosk_wm") {
+# kios_wm is the one and only window_manager used for chromium's mojo_shell, so

[Ben Goodger (Google), 2015/04/09 23:25:22]

"Mojo shell in chromium is only used for Mandoline, and Mandoline only uses
kiosk_wm, so we name the target window_manager to avoid having to remap on the
command line."

[jam, 2015/04/10 00:06:55]

Done.

+# name the target window_manager.mojo without having to remap.
+mojo_native_application("window_manager") {
   sources = [
     "kiosk_wm.cc",
     "kiosk_wm.h",