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

mojo/mojo.gyp

Index: mojo/mojo.gyp
diff --git a/mojo/mojo.gyp b/mojo/mojo.gyp
index af6e853df4aa13b87db154d21def9c40c9850cf6..08aa31dbc6066fc71076982f357c60be1770b889 100644
--- a/mojo/mojo.gyp
+++ b/mojo/mojo.gyp
@@ -65,6 +65,23 @@
       ]
     },
     {
+      'target_name': 'mojo_external_service_bindings',
+      'type': 'static_library',
+      'sources': [
+        'shell/external_service.mojom',
+      ],
+      'variables': {
+        'mojom_base_output_dir': 'mojo',
+      },
+      'includes': [ 'public/tools/bindings/mojom_bindings_generator.gypi' ],
+      'export_dependent_settings': [
+        'mojo_bindings',
+      ],
+      'dependencies': [
+        'mojo_bindings',
+      ],
+    },
+    {
       'target_name': 'mojo_run_all_unittests',
       'type': 'static_library',
       'dependencies': [
@@ -410,8 +427,11 @@
       'dependencies': [
         '../base/base.gyp:base',
         '../base/base.gyp:base_static',
+        '../build/linux/system.gyp:dbus',

[Chris Masone, 2014/04/18 18:26:28]

I need to make all of this linux-specific stuff be conditional before landing
this.

+        '../dbus/dbus.gyp:dbus',
         '../net/net.gyp:net',
         '../url/url.gyp:url_lib',
+        'mojo_external_service_bindings',
         'mojo_gles2_impl',
         'mojo_service_manager',
         'mojo_shell_bindings',
@@ -435,6 +455,8 @@
         'shell/child_process_host.h',
         'shell/context.cc',
         'shell/context.h',
+        'shell/dbus_service_loader.cc',
+        'shell/dbus_service_loader.h',
         'shell/dynamic_service_loader.cc',
         'shell/dynamic_service_loader.h',
         'shell/dynamic_service_runner.h',