Embed a mojo ApplicationManager in content/browser

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 "base/callback.h"
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "content/common/content_export.h"
+#include "mojo/shell/application_loader.h"
+
+namespace base {
+class Thread;
+}
+
+namespace mojo {
+class ApplicationDelegate;
+}
+
+namespace content {
+
+// An ApplicationLoader which knows how to instantiate a corresponding
+// ApplicationDelegate directly. Used to load applications which are linked
+// into content or its embedder.
+class CONTENT_EXPORT StaticMojoApplicationLoader
+    : public mojo::shell::ApplicationLoader {
+ public:
+  using ApplicationFactory =
+      base::Callback<scoped_ptr<mojo::ApplicationDelegate>()>;
+
+  // Constructs a static loader for |factory|.
+  explicit StaticMojoApplicationLoader(const ApplicationFactory& factory);
+
+  // Constructs a static loader for |factory| with a closure that will be called
+  // when the loaded application quits.
+  StaticMojoApplicationLoader(const ApplicationFactory& factory,
+                              const base::Closure& quit_callback);
+
+  ~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 CleanUpAppThread(typename ThreadList::iterator iter);
+
+  // The factory used t create new instances of the application delegate.
+  ApplicationFactory factory_;
+
+  // If not null, this is called when an instance of the loaded application
+  // quits.
+  base::Closure quit_callback_;
+
+  // 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_