Implement a trivial Mojo EchoService that can be connected to over DBus

mojo/shell/context.h

Index: mojo/shell/context.h
diff --git a/mojo/shell/context.h b/mojo/shell/context.h
index 57ed5d508ab8b8cd44028414e4eff9658fd16a26..2f362e047a7d4ec725568caf15c0aa6cbd989a83 100644
--- a/mojo/shell/context.h
+++ b/mojo/shell/context.h
@@ -21,6 +21,7 @@ class Spy;
 
 namespace shell {
 
+class DBusServiceLoader;
 class DynamicServiceLoader;
 
 // The "global" context for the shell's main process.
@@ -46,6 +47,7 @@ class Context {
   Storage storage_;
   Loader loader_;
   ServiceManager service_manager_;
+  scoped_ptr<DBusServiceLoader> dbus_service_loader_;

[viettrungluu, 2014/04/18 19:40:15]

FYI: I believe Dave is working on making the ServiceManager just own the loaders
its given, so soon this won't be necessary.

(Which is good, since it'll make it easier/nicer to make this conditional on
being on Linux.)

   scoped_ptr<DynamicServiceLoader> dynamic_service_loader_;
   scoped_ptr<Spy> spy_;
   scoped_ptr<NativeViewportServiceLoader> native_viewport_service_loader_;