Embed a simple Mojo shell in content

content/public/common/static_mojo_application_loader.h

+// 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.
+
+#ifndef CONTENT_PUBLIC_COMMON_STATIC_MOJO_APPLICATION_LOADER_H_
+#define CONTENT_PUBLIC_COMMON_STATIC_MOJO_APPLICATION_LOADER_H_
+
+#include <list>
+#include <string>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "mojo/shell/application_loader.h"
+
+namespace base {
+class Thread;
+}
+
+namespace mojo {
+class ApplicationDelegate;
+}
+
+namespace content {
+
+// This ApplicationLoader may be used to load applications which are linked into
+// the content embedder's binary.
+class StaticMojoApplicationLoader : public mojo::shell::ApplicationLoader {
+ public:
+  using ApplicationFactory =
+      base::Callback<scoped_ptr<mojo::ApplicationDelegate>()>;
+
+  // Create a new loader for a static applications. |name| is used to identify
+  // application-main threads. |factory| MUST be safe to run on any thread.
+  StaticMojoApplicationLoader(const std::string& name,
+                              const ApplicationFactory& factory);
+  ~StaticMojoApplicationLoader() override;
+
+  // mojo::shell::ApplicationLoader:
+  void Load(const GURL& url,
+            mojo::InterfaceRequest<mojo::Application> request) override;
+
+ private:
+  using ThreadList = std::list<scoped_ptr<base::Thread>>;
+
+  void ClearThread(typename ThreadList::iterator iter);
+
+  // The name to use this app's threads.
+  std::string name_;
+
+  // The factory used to create new instances of the application's delegate.
+  ApplicationFactory factory_;
+
+  // List of all threads started by this loader. Each running instance of an
+  // application will have a corresponding thread in this list.
+  ThreadList threads_;
+
+  base::WeakPtrFactory<StaticMojoApplicationLoader> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(StaticMojoApplicationLoader);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_COMMON_STATIC_MOJO_APPLICATION_LOADER_H_