This gets mojo_launcher.so a little further along toward running.

mojo/examples/launcher/launcher.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdio.h>
 #include <string>
 
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 49 matching lines @@
 namespace mojo {
 namespace examples {
 
 class MinimalInputEventFilter : public ui::internal::InputMethodDelegate,
                                 public ui::EventHandler {
  public:
   explicit MinimalInputEventFilter(aura::Window* root)
       : root_(root),
         input_method_(ui::CreateInputMethod(this,
                                             gfx::kNullAcceleratedWidget)) {
+    ui::InitializeInputMethod();
     input_method_->Init(true);
     root_->AddPreTargetHandler(this);
     root_->SetProperty(aura::client::kRootWindowInputMethodKey,
                        input_method_.get());
   }
 
   virtual ~MinimalInputEventFilter() {
     root_->RemovePreTargetHandler(this);
     root_->SetProperty(aura::client::kRootWindowInputMethodKey,
                        static_cast<ui::InputMethod*>(NULL));
@@ skipping 214 matching lines @@
 
   // TODO(beng): This crashes in a DCHECK on X11 because this thread's
   //             MessageLoop is not of TYPE_UI. I think we need a way to build
   //             Aura that doesn't define platform-specific stuff.
   aura::Env::CreateInstance();
   mojo::examples::LauncherImpl launcher(shell_handle);
   loop.Run();
 
   return MOJO_RESULT_OK;
 }