Launch nexes from mojo_shell.

shell/nacl/nacl_service_runner.cc

Index: shell/nacl/nacl_service_runner.cc
diff --git a/shell/nacl/nacl_service_runner.cc b/shell/nacl/nacl_service_runner.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0fdf6157eca4fcf593defa6679ec61a884182cb6
--- /dev/null
+++ b/shell/nacl/nacl_service_runner.cc
@@ -0,0 +1,51 @@
+// Copyright 2015 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 "shell/nacl/nacl_service_runner.h"
+
+#include "mojo/nacl/monacl_sel_main.h"
+#include "shell/context.h"
+
+namespace mojo {
+namespace shell {
+
+NaClServiceRunner::NaClServiceRunner(Context* context) : context_(context) {
+}
+
+NaClServiceRunner::~NaClServiceRunner() {
+  if (thread_) {
+    DCHECK(thread_->HasBeenStarted());
+    DCHECK(!thread_->HasBeenJoined());
+    thread_->Join();
+  }
+}
+
+void NaClServiceRunner::Start(
+    const base::FilePath& app_path,
+    InterfaceRequest<Application> application_request) {
+  // TODO(ncbray) be more principled about finding the IRT.
+  irt_path_ = base::FilePath(
+      context_->ResolveShellFileURL("irt_x64/irt_mojo.nexe").GetContent());
+
+  app_path_ = app_path;
+
+  DCHECK(!application_request_.is_pending());
+  application_request_ = application_request.Pass();
+
+  DCHECK(!thread_);
+  thread_.reset(new base::DelegateSimpleThread(this, "app_thread"));
+  thread_->Start();
+}
+
+void NaClServiceRunner::Run() {
+  MojoHandle handle = application_request_.PassMessagePipe().release().value();
+
+  // This function will never return - it will take the process down instead.
+  LaunchNaCl(app_path_.AsUTF8Unsafe().c_str(), irt_path_.AsUTF8Unsafe().c_str(),
+             0, nullptr, handle);
+  NOTREACHED();
+}
+
+}  // namespace shell
+}  // namespace mojo