arc: Add splash screen for ARC++ Kiosk startup

chrome/browser/ui/webui/chromeos/login/arc_kiosk_splash_screen_handler.h

+// Copyright 2017 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 CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_ARC_KIOSK_SPLASH_SCREEN_HANDLER_H_
+#define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_ARC_KIOSK_SPLASH_SCREEN_HANDLER_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "chrome/browser/chromeos/login/screens/arc_kiosk_splash_screen_actor.h"
+#include "chrome/browser/ui/webui/chromeos/login/base_screen_handler.h"
+
+namespace base {
+class DictionaryValue;
+}
+
+namespace chromeos {
+
+// A class that handles the WebUI hooks for the ARC kiosk splash screen.
+class ArcKioskSplashScreenHandler : public BaseScreenHandler,
+                                    public ArcKioskSplashScreenActor {
+ public:
+  ArcKioskSplashScreenHandler();
+  ~ArcKioskSplashScreenHandler() override;
+
+ private:
+  // BaseScreenHandler implementation:
+  void DeclareLocalizedValues(
+      ::login::LocalizedValuesBuilder* builder) override;
+  void Initialize() override;
+
+  // WebUIMessageHandler implementation:
+  void RegisterMessages() override;
+
+  // ArcKioskSplashScreenActor implementation:
+  void Show() override;
+  void UpdateArcKioskState(ArcKioskState state) override;
+  void SetDelegate(ArcKioskSplashScreenHandler::Delegate* delegate) override;
+
+  void PopulateAppInfo(base::DictionaryValue* out_info);
+  void SetLaunchText(const std::string& text);
+  int GetProgressMessageFromState(ArcKioskState state);
+  void HandleCancelArcKioskLaunch();
+
+  ArcKioskSplashScreenHandler::Delegate* delegate_ = nullptr;
+  bool show_on_init_ = false;
+
+  DISALLOW_COPY_AND_ASSIGN(ArcKioskSplashScreenHandler);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_ARC_KIOSK_SPLASH_SCREEN_HANDLER_H_