mash: improves browser frame decorations

ash/common/frame/header_view.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 ASH_COMMON_FRAME_HEADER_VIEW_H_
 #define ASH_COMMON_FRAME_HEADER_VIEW_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
 #include "ash/common/shell_observer.h"
+#include "ash/public/interfaces/window_style.mojom.h"
 #include "ash/shared/immersive_fullscreen_controller_delegate.h"
 #include "base/macros.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/views/view.h"
 
 namespace views {
 class ImageView;
 class Widget;
 }
 
 namespace ash {
 
 class DefaultHeaderPainter;
 class FrameCaptionButtonContainerView;
 
 // View which paints the frame header (title, caption buttons...). It slides off
 // and on screen in immersive fullscreen.
 class ASH_EXPORT HeaderView : public views::View,
                               public ImmersiveFullscreenControllerDelegate,
                               public ShellObserver {
  public:
   // |target_widget| is the widget that the caption buttons act on.
   // |target_widget| is not necessarily the same as the widget the header is
   // placed in. For example, in immersive fullscreen this view may be painted in
   // a widget that slides in and out on top of the main app or browser window.
   // However, clicking a caption button should act on the target widget.
-  explicit HeaderView(views::Widget* target_widget);
+  explicit HeaderView(
+      views::Widget* target_widget,
+      mojom::WindowStyle window_style = mojom::WindowStyle::DEFAULT);
   ~HeaderView() override;
 
   void set_is_immersive_delegate(bool value) { is_immersive_delegate_ = value; }
 
   // Schedules a repaint for the entire title.
   void SchedulePaintForTitle();
 
   // Tells the window controls to reset themselves to the normal state.
   void ResetWindowControls();
 
@@ skipping 58 matching lines @@
   bool is_immersive_delegate_ = true;
 
   bool did_layout_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(HeaderView);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_FRAME_HEADER_VIEW_H_