mash: Preliminary support for widget hit test masks

components/mus/public/cpp/lib/window_tree_client_impl.h

 // Copyright 2014 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 COMPONENTS_MUS_PUBLIC_CPP_LIB_WINDOW_TREE_CLIENT_IMPL_H_
 #define COMPONENTS_MUS_PUBLIC_CPP_LIB_WINDOW_TREE_CLIENT_IMPL_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 69 matching lines @@
   bool OwnsWindow(Window* window) const;
 
   void SetBounds(Window* window,
                  const gfx::Rect& old_bounds,
                  const gfx::Rect& bounds);
   void SetCapture(Window* window);
   void ReleaseCapture(Window* window);
   void SetClientArea(Id window_id,
                      const gfx::Insets& client_area,
                      const std::vector<gfx::Rect>& additional_client_areas);
+  void SetHitTestMask(Id window_id, const gfx::Rect& mask);
+  void ClearHitTestMask(Id window_id);
   void SetFocus(Window* window);
   void SetCanFocus(Id window_id, bool can_focus);
   void SetPredefinedCursor(Id window_id, mus::mojom::Cursor cursor_id);
   void SetVisible(Window* window, bool visible);
   void SetOpacity(Window* window, float opacity);
   void SetProperty(Window* window,
                    const std::string& name,
                    mojo::Array<uint8_t> data);
   void SetWindowTextInputState(Id window_id, mojo::TextInputStatePtr state);
   void SetImeVisibility(Id window_id,
@@ skipping 222 matching lines @@
   uint32_t event_observer_id_ = 0u;
 
   base::WeakPtrFactory<WindowTreeClientImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowTreeClientImpl);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_PUBLIC_CPP_LIB_WINDOW_TREE_CLIENT_IMPL_H_