Separate mojo/shell into a runner and the application manager (shell)

mojo/runner/test/pingable_app.cc

Index: mojo/runner/test/pingable_app.cc
diff --git a/mojo/shell/test/pingable_app.cc b/mojo/runner/test/pingable_app.cc
similarity index 97%
rename from mojo/shell/test/pingable_app.cc
rename to mojo/runner/test/pingable_app.cc
index 1849f71480f0b0defc6bfece607339da0ec34f30..f62dd2e3eb542a3b9b65939fc23b844d158f932c 100644
--- a/mojo/shell/test/pingable_app.cc
+++ b/mojo/runner/test/pingable_app.cc
@@ -10,7 +10,7 @@
 #include "mojo/public/cpp/bindings/callback.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
-#include "mojo/shell/test/pingable.mojom.h"
+#include "mojo/runner/test/pingable.mojom.h"
 
 namespace mojo {