Replace WM shadow types (on/off) and styles (small/inactive/active)

ui/views/widget/widget.h

 // Copyright (c) 2012 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 UI_VIEWS_WIDGET_WIDGET_H_
 #define UI_VIEWS_WIDGET_WIDGET_H_
 
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/observer_list.h"
+#include "base/optional.h"
 #include "base/scoped_observer.h"
 #include "build/build_config.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/events/event_source.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/native_theme/native_theme_observer.h"
 #include "ui/views/focus/focus_manager.h"
 #include "ui/views/widget/native_widget_delegate.h"
 #include "ui/views/window/client_view.h"
@@ skipping 26 matching lines @@
 class Compositor;
 class DefaultThemeProvider;
 class InputMethod;
 class Layer;
 class NativeTheme;
 class OSExchangeData;
 class ThemeProvider;
 class Window;
 }  // namespace ui
 
+namespace wm {
+enum class ShadowElevation;
+}
+
 namespace views {
 
 class DesktopWindowTreeHost;
 class NativeWidget;
 class NonClientFrameView;
 class TooltipManager;
 class View;
 class WidgetDelegate;
 class WidgetObserver;
 class WidgetRemovalsObserver;
@@ skipping 153 matching lines @@
     // IsTranslucentWindowOpacitySupported to determine whether they are.
     WindowOpacity opacity;
     bool accept_events;
     Activatable activatable;
     bool keep_on_top;
     bool visible_on_all_workspaces;
     // See Widget class comment above.
     Ownership ownership;
     bool mirror_origin_in_rtl;
     ShadowType shadow_type;
+    // A hint about the size of the shadow if the type is SHADOW_TYPE_DROP. May
+    // be ignored on some platforms. No value indicates no preference.
+    base::Optional<wm::ShadowElevation> shadow_elevation;
     // Specifies that the system default caption and icon should not be
     // rendered, and that the client area should be equivalent to the window
     // area. Only used on some platforms (Windows and Linux).
     bool remove_standard_frame;
     // Only used by ShellWindow on Windows. Specifies that the default icon of
     // packaged app should be the system default icon.
     bool use_system_default_icon;
     // Whether the widget should be maximized or minimized.
     ui::WindowShowState show_state;
     gfx::NativeView parent;
@@ skipping 725 matching lines @@
   bool movement_disabled_;
 
   ScopedObserver<ui::NativeTheme, ui::NativeThemeObserver> observer_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(Widget);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_WIDGET_H_