Embed a simple Mojo shell in content

content/public/browser/mojo_app_connection.cc

+// 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 "content/public/browser/mojo_app_connection.h"
+
+#include "base/bind.h"
+#include "base/lazy_instance.h"
+#include "base/location.h"
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "base/single_thread_task_runner.h"
+#include "base/thread_task_runner_handle.h"
+#include "base/threading/thread_local.h"
+#include "mojo/shell/application_manager.h"
+#include "third_party/mojo/src/mojo/public/cpp/bindings/binding.h"
+#include "url/gurl.h"
+
+namespace content {
+
+namespace {
+
+// Virtual requestor URL to use when connecting to applications through
+// MojoAppConnection instances.
+const char kBrowserAppUrl[] = "system:content_browser";
+
+mojo::shell::ApplicationManager* g_application_manager;
+base::SingleThreadTaskRunner* g_application_manager_task_runner;
+
+void ConnectToApplicationOnManagerThread(
+    const GURL& application_url,
+    mojo::InterfaceRequest<mojo::ServiceProvider> services) {
+  DCHECK(g_application_manager);
+  g_application_manager->ConnectToApplication(
+      application_url, GURL(kBrowserAppUrl), services.Pass(),
+      mojo::ServiceProviderPtr(), base::Bind(&base::DoNothing));
+}
+
+void ConnectToApplication(
+    const GURL& application_url,
+    mojo::InterfaceRequest<mojo::ServiceProvider> services) {
+  DCHECK(g_application_manager_task_runner);
+  if (g_application_manager_task_runner)
+    g_application_manager_task_runner->PostTask(
+        FROM_HERE, base::Bind(&ConnectToApplicationOnManagerThread,
+                              application_url, base::Passed(&services)));
+}
+
+}  // namespace
+
+MojoAppConnection::MojoAppConnection(const GURL& application_url) {
+  ConnectToApplication(application_url, mojo::GetProxy(&remote_services_));
+}
+
+MojoAppConnection::~MojoAppConnection() {
+}
+
+void MojoAppConnection::SetApplicationManager(
+    mojo::shell::ApplicationManager* application_manager) {
+  g_application_manager = application_manager;
+  g_application_manager_task_runner = base::ThreadTaskRunnerHandle::Get().get();
+}
+
+}  // namespace content