[MacViews] Add NativeAppWindowViewsMac and port HideWithApp behavior from NativeAppWindowCocoa.

chrome/browser/ui/views/apps/chrome_native_app_window_views_mac.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 CHROME_BROWSER_UI_VIEWS_APPS_CHROME_NATIVE_APP_WINDOW_VIEWS_MAC_H_
+#define CHROME_BROWSER_UI_VIEWS_APPS_CHROME_NATIVE_APP_WINDOW_VIEWS_MAC_H_
+
+#include "chrome/browser/ui/views/apps/chrome_native_app_window_views.h"
+
+// Mac-specific parts of ChromeNativeAppWindowViews.
+class ChromeNativeAppWindowViewsMac : public ChromeNativeAppWindowViews {
+ public:
+  ChromeNativeAppWindowViewsMac();
+  ~ChromeNativeAppWindowViewsMac() override;
+
+ protected:
+  // ui::BaseWindow implementation.
+  void Show() override;
+  void ShowInactive() override;
+
+  // NativeAppWindow implementation.
+  // These are used to simulate Mac-style hide/show. Since windows can be hidden
+  // and shown using the app.window API, this sets is_hidden_with_app_ to
+  // differentiate the reason a window was hidden.
+  void ShowWithApp() override;
+  void HideWithApp() override;
+
+ private:
+  // Whether this window last became hidden due to a request to hide the entire
+  // app, e.g. via the dock menu or Cmd+H. This is set by Hide/ShowWithApp.
+  bool is_hidden_with_app_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeNativeAppWindowViewsMac);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_APPS_CHROME_NATIVE_APP_WINDOW_VIEWS_MAC_H_