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

mash/simple_wm/simple_wm.h

Index: mash/simple_wm/simple_wm.h
diff --git a/mash/simple_wm/simple_wm.h b/mash/simple_wm/simple_wm.h
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+// 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_SIMPLE_WM_SIMPLE_WM_H_
+#define MASH_SIMPLE_WM_SIMPLE_WM_H_
+
+#include <memory>
+#include <utility>
+
+#include "base/memory/ptr_util.h"
+#include "base/threading/thread_task_runner_handle.h"
+#include "mojo/public/cpp/bindings/binding.h"
+#include "services/service_manager/public/cpp/connector.h"
+#include "services/service_manager/public/cpp/service.h"
+#include "services/service_manager/public/cpp/service_context.h"
+#include "services/ui/public/cpp/gpu/gpu_service.h"
+#include "ui/aura/env.h"
+#include "ui/aura/mus/mus_context_factory.h"
+#include "ui/aura/mus/property_converter.h"
+#include "ui/aura/mus/property_utils.h"
+#include "ui/aura/mus/window_manager_delegate.h"
+#include "ui/aura/mus/window_tree_client.h"
+#include "ui/aura/mus/window_tree_client_delegate.h"
+#include "ui/aura/mus/window_tree_host_mus.h"
+#include "ui/aura/test/test_focus_client.h"
+#include "ui/aura/window.h"
+#include "ui/display/display.h"
+#include "ui/wm/core/capture_controller.h"
+#include "ui/wm/core/wm_state.h"
+
+namespace display {
+class ScreenBase;
+}
+
+namespace views {
+class AuraInit;
+}
+
+namespace simple_wm {
+
+class SimpleWM : public service_manager::Service,
+                 public aura::WindowTreeClientDelegate,
+                 public aura::WindowManagerDelegate {
+ public:
+  SimpleWM();
+  ~SimpleWM() override;
+
+ private:
+  class FrameView;
+
+  // service_manager::Service:
+  void OnStart() override;
+  bool OnConnect(const service_manager::ServiceInfo& remote_info,
+                 service_manager::InterfaceRegistry* registry) override;
+
+  // aura::WindowTreeClientDelegate:
+  void OnEmbed(
+      std::unique_ptr<aura::WindowTreeHostMus> window_tree_host) override;
+  void OnLostConnection(aura::WindowTreeClient* client) override;
+  void OnEmbedRootDestroyed(aura::Window* root) override;
+  void OnPointerEventObserved(const ui::PointerEvent& event,
+                              aura::Window* target) override;
+  aura::client::CaptureClient* GetCaptureClient() override;
+  aura::PropertyConverter* GetPropertyConverter() override;
+
+  // aura::WindowManagerDelegate:
+  void SetWindowManagerClient(aura::WindowManagerClient* client) override;
+  bool OnWmSetBounds(aura::Window* window, gfx::Rect* bounds) override;
+  bool OnWmSetProperty(
+      aura::Window* window,
+      const std::string& name,
+      std::unique_ptr<std::vector<uint8_t>>* new_data) override;
+  aura::Window* OnWmCreateTopLevelWindow(
+      ui::mojom::WindowType window_type,
+      std::map<std::string, std::vector<uint8_t>>* properties) override;
+  void OnWmClientJankinessChanged(const std::set<aura::Window*>& client_windows,
+                                  bool janky) override;
+  void OnWmWillCreateDisplay(const display::Display& display) override;
+  void OnWmNewDisplay(std::unique_ptr<aura::WindowTreeHostMus> window_tree_host,
+                      const display::Display& display) override;
+  void OnWmDisplayRemoved(aura::WindowTreeHostMus* window_tree_host) override;
+  void OnWmDisplayModified(const display::Display& display) override;
+  void OnWmPerformMoveLoop(aura::Window* window,
+                           ui::mojom::MoveLoopSource source,
+                           const gfx::Point& cursor_location,
+                           const base::Callback<void(bool)>& on_done) override;
+  void OnWmCancelMoveLoop(aura::Window* window) override;
+  void OnWmSetClientArea(
+      aura::Window* window,
+      const gfx::Insets& insets,
+      const std::vector<gfx::Rect>& additional_client_areas) override;
+
+  FrameView* GetFrameViewForClientWindow(aura::Window* client_window);
+
+  std::unique_ptr<views::AuraInit> aura_init_;
+  ::wm::WMState wm_state_;
+  std::unique_ptr<display::ScreenBase> screen_;
+  aura::PropertyConverter property_converter_;
+  aura::test::TestFocusClient focus_client_;
+  std::unique_ptr<aura::WindowTreeHostMus> window_tree_host_;
+  aura::Window* root_ = nullptr;
+  aura::WindowManagerClient* window_manager_client_ = nullptr;
+  std::unique_ptr<aura::WindowTreeClient> window_tree_client_;
+  std::unique_ptr<ui::GpuService> gpu_service_;
+  std::unique_ptr<aura::MusContextFactory> compositor_context_factory_;
+  std::map<aura::Window*, FrameView*> client_window_to_frame_view_;
+
+  bool started_ = false;
+
+  DISALLOW_COPY_AND_ASSIGN(SimpleWM);
+};
+
+}  // namespace simple_wm
+
+#endif  // MASH_SIMPLE_WM_SIMPLE_WM_H_