Add the beginning of a simple window manager that we'll support on Windows.

mash/wm/wm.h

+// Copyright 2016 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 MASH_WM_WM_H_
+#define MASH_WM_WM_H_
+
+#include <memory>
+
+#include "mojo/public/cpp/bindings/binding.h"
+#include "services/service_manager/public/cpp/service.h"
+#include "services/ui/public/cpp/window_manager_delegate.h"
+#include "services/ui/public/cpp/window_tree_client_delegate.h"
+#include "ui/display/display.h"
+
+namespace mash {
+namespace wm {
+
+class WM : public service_manager::Service,

[sky, 2016/11/17 20:41:58]

Could I convince you to go with a more specific name? It gets confusing to talk
with people when we use the same name. Maybe TrivialWM?

+           public ui::WindowTreeClientDelegate,
+           public ui::WindowManagerDelegate {
+ public:
+  WM();
+  ~WM() override;
+
+ private:
+  // service_manager::Service:
+  void OnStart() override;
+  bool OnConnect(const service_manager::ServiceInfo& remote_info,
+                 service_manager::InterfaceRegistry* registry) override;
+
+  // ui::WindowTreeClientDelegate:
+  void OnEmbed(ui::Window* root) override;
+  void OnLostConnection(ui::WindowTreeClient* client) override;
+  void OnEmbedRootDestroyed(ui::Window* root) override;
+  void OnPointerEventObserved(const ui::PointerEvent& event,
+                              ui::Window* target) override;
+
+  // ui::WindowManagerDelegate:
+  void SetWindowManagerClient(ui::WindowManagerClient* client) override;
+  bool OnWmSetBounds(ui::Window* window, gfx::Rect* bounds) override;
+  bool OnWmSetProperty(
+      ui::Window* window,
+      const std::string& name,
+      std::unique_ptr<std::vector<uint8_t>>* new_data) override;
+  ui::Window* OnWmCreateTopLevelWindow(
+      std::map<std::string, std::vector<uint8_t>>* properties) override;
+  void OnWmClientJankinessChanged(const std::set<ui::Window*>& client_windows,
+                                  bool janky) override;
+  void OnWmNewDisplay(ui::Window* window,
+                      const display::Display& display) override;
+  void OnWmDisplayRemoved(ui::Window* window) override;
+  void OnWmDisplayModified(const display::Display& display) override;
+  void OnWmPerformMoveLoop(ui::Window* window,
+                           ui::mojom::MoveLoopSource source,
+                           const gfx::Point& cursor_location,
+                           const base::Callback<void(bool)>& on_done) override;
+  void OnWmCancelMoveLoop(ui::Window* window) override;
+
+  ui::Window* root_ = nullptr;
+  ui::WindowManagerClient* window_manager_client_ = nullptr;
+  std::unique_ptr<ui::WindowTreeClient> window_tree_client_;
+
+  DISALLOW_COPY_AND_ASSIGN(WM);
+};
+
+}  // namespace wm
+}  // namespace mash
+
+#endif  // MASH_WM_WM_H_