EDK: Add a mojo::platform::MessageLoop abstraction.

mojo/edk/base_edk/platform_message_loop_impl.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.
+
+// This file provides an implementation of |mojo::platform::MessageLoop| that
+// wraps a |base::MessageLoop|.
+
+#ifndef MOJO_EDK_BASE_EDK_PLATFORM_MESSAGE_LOOP_IMPL_H_
+#define MOJO_EDK_BASE_EDK_PLATFORM_MESSAGE_LOOP_IMPL_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop/message_loop.h"
+#include "mojo/edk/platform/message_loop.h"
+#include "mojo/edk/platform/task_runner.h"
+
+namespace base_edk {
+
+class PlatformMessageLoopImpl : public mojo::platform::MessageLoop {
+ public:
+  explicit PlatformMessageLoopImpl(
+      base::MessageLoop::Type type = base::MessageLoop::TYPE_DEFAULT);
+  explicit PlatformMessageLoopImpl(scoped_ptr<base::MessagePump> pump);
+  ~PlatformMessageLoopImpl() override;
+
+  const base::MessageLoop& base_message_loop() const {
+    return base_message_loop_;
+  }
+  base::MessageLoop& base_message_loop() { return base_message_loop_; }
+
+  // |mojo::platform::MessageLoop| implementation:
+  void Run() override;
+  void RunUntilIdle() override;
+  void QuitWhenIdle() override;
+  const mojo::util::RefPtr<mojo::platform::TaskRunner>& GetTaskRunner()
+      const override;
+  bool IsRunningOnCurrentThread() const override;
+
+ private:
+  base::MessageLoop base_message_loop_;
+  mojo::util::RefPtr<mojo::platform::TaskRunner> task_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(PlatformMessageLoopImpl);
+};
+
+}  // namespace base_edk
+
+#endif  // MOJO_EDK_BASE_EDK_PLATFORM_MESSAGE_LOOP_IMPL_H_