mash: Preliminary support for widget hit test masks

ui/views/mus/native_widget_mus.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 UI_VIEWS_MUS_NATIVE_WIDGET_MUS_H_
 #define UI_VIEWS_MUS_NATIVE_WIDGET_MUS_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 220 matching lines @@
   ui::PlatformWindowDelegate* platform_window_delegate() {
     return window_tree_host();
   }
 
   void set_last_cursor(mus::mojom::Cursor cursor) { last_cursor_ = cursor; }
   void SetShowState(mus::mojom::ShowState show_state);
 
   void OnMusWindowVisibilityChanging(mus::Window* window);
   void OnMusWindowVisibilityChanged(mus::Window* window);
 
+  // Propagates the widget hit test mask, if any, to the mus::Window.
+  // TODO(jamescook): Wire this through views::Widget so widgets can push
+  // updates if needed.
+  void UpdateHitTestMask();
+
   mus::Window* window_;
   mus::mojom::Cursor last_cursor_;
 
   internal::NativeWidgetDelegate* native_widget_delegate_;
 
   const mus::mojom::SurfaceType surface_type_;
   mus::mojom::ShowState show_state_before_fullscreen_;
 
   // See class documentation for Widget in widget.h for a note about ownership.
   Widget::InitParams::Ownership ownership_;
@@ skipping 12 matching lines @@
   std::unique_ptr<aura::client::ScreenPositionClient> screen_position_client_;
   std::unique_ptr<wm::CursorManager> cursor_manager_;
   base::WeakPtrFactory<NativeWidgetMus> close_widget_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeWidgetMus);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_MUS_NATIVE_WIDGET_MUS_H_