Change mojo URLs from mojo://mojo_foo to mojo://foo.

mojo/examples/demo_launcher/demo_launcher.cc

 // Copyright 2014 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 "mojo/application/application_runner_chromium.h"
 #include "mojo/public/c/system/main.h"
 #include "mojo/public/cpp/application/application_delegate.h"
 #include "mojo/services/public/cpp/view_manager/view_manager.h"
 #include "mojo/services/public/cpp/view_manager/view_manager_context.h"
 
 namespace examples {
 
 class DemoLauncher : public mojo::ApplicationDelegate {
  public:
   DemoLauncher() {}
   virtual ~DemoLauncher() {}
 
  private:
   virtual void Initialize(mojo::ApplicationImpl* app) override {
     context_.reset(new mojo::ViewManagerContext(app));
-    context_->Embed("mojo:mojo_window_manager");
+    context_->Embed("mojo:window_manager");
   }
 
   scoped_ptr<mojo::ViewManagerContext> context_;
 
   DISALLOW_COPY_AND_ASSIGN(DemoLauncher);
 };
 
 }  // namespace examples
 
 MojoResult MojoMain(MojoHandle shell_handle) {
   mojo::ApplicationRunnerChromium runner(new examples::DemoLauncher);
   return runner.Run(shell_handle);
 }