Make aura work with mus

ui/aura/mus/window_tree_host_mus.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 UI_AURA_MUS_WINDOW_TREE_HOST_MUS_H_
+#define UI_AURA_MUS_WINDOW_TREE_HOST_MUS_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "services/service_manager/public/cpp/connector.h"
+#include "ui/aura/aura_export.h"
+#include "ui/aura/window_tree_host_platform.h"
+
+class SkBitmap;
+
+namespace service_manager {
+class Connector;
+}
+
+namespace aura {
+
+class InputMethodMus;
+class WindowPortMus;
+
+// WindowTreeHostMus is configured in two distinct modes:
+// . with a content window. In this case the content window is added as a child
+//   of the Window created by this class. Any changes to the size of the content
+//   window is propagated to its parent. Additionally once the content window is
+//   destroyed the WindowTreeHostMus is destroyed.
+// . without a content window.
+//
+// If a content window is supplied WindowTreeHostMus deletes itself when the
+// content window is destroyed. If no content window is supplied it is assumed
+// the WindowTreeHostMus is explicitly deleted.
+class AURA_EXPORT WindowTreeHostMus : public aura::WindowTreeHostPlatform {
+ public:
+  explicit WindowTreeHostMus(std::unique_ptr<WindowPortMus> window_port,
+                             Window* content_window = nullptr);
+  ~WindowTreeHostMus() override;
+
+  void CreateInputMethod(WindowPortMus* window_port_mus);
+
+  ui::EventDispatchDetails SendEventToProcessor(ui::Event* event) {
+    return aura::WindowTreeHostPlatform::SendEventToProcessor(event);
+  }
+
+  Window* content_window() { return content_window_; }
+
+  InputMethodMus* input_method() { return input_method_.get(); }
+
+ private:
+  class ContentWindowObserver;
+
+  // Called when various things happen to the content window.
+  void ContentWindowDestroyed();
+  void ContentWindowResized();
+  void ContentWindowVisibilityChanging(bool visible);
+
+  // aura::WindowTreeHostPlatform:
+  void DispatchEvent(ui::Event* event) override;
+  void OnClosed() override;
+  void OnActivationChanged(bool active) override;
+  void OnCloseRequest() override;
+  gfx::ICCProfile GetICCProfileForCurrentDisplay() override;
+
+  // May be null, see class description.
+  Window* content_window_;
+
+  std::unique_ptr<ContentWindowObserver> content_window_observer_;
+  std::unique_ptr<InputMethodMus> input_method_;
+
+  DISALLOW_COPY_AND_ASSIGN(WindowTreeHostMus);
+};
+
+}  // namespace aura
+
+#endif  // UI_AURA_MUS_WINDOW_TREE_HOST_MUS_H_