mus: Implement ScreenMus::GetCursorScreenPoint().

components/mus/ws/window_manager_state.cc

 // 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.
 
 #include "components/mus/ws/window_manager_state.h"
 
 #include "base/memory/weak_ptr.h"
 #include "components/mus/ws/accelerator.h"
 #include "components/mus/ws/display_manager.h"
 #include "components/mus/ws/platform_display.h"
@@ skipping 147 matching lines @@
   if (tree_awaiting_input_ack_ != tree)
     return;
   // The WindowTree is dying. So it's not going to ack the event.
   // If the dying tree matches the root |tree_| marked as handled so we don't
   // notify it of accelerators.
   OnEventAck(tree_awaiting_input_ack_, tree == tree_
                                            ? mojom::EventResult::HANDLED
                                            : mojom::EventResult::UNHANDLED);
 }
 
+gfx::Point WindowManagerState::GetCursorLocation() const {
+  return event_dispatcher_.mouse_pointer_last_location();
+}
+
 WindowManagerState::WindowManagerState(Display* display,
                                        PlatformDisplay* platform_display,
                                        cc::SurfaceId surface_id,
                                        bool is_user_id_valid,
                                        const UserId& user_id)
     : display_(display),
       platform_display_(platform_display),
       is_user_id_valid_(is_user_id_valid),
       user_id_(user_id),
       event_dispatcher_(this) {
@@ skipping 200 matching lines @@
 
   base::WeakPtr<Accelerator> weak_accelerator;
   if (accelerator)
     weak_accelerator = accelerator->GetWeakPtr();
   DispatchInputEventToWindowImpl(target, in_nonclient_area, event,
                                  weak_accelerator);
 }
 
 }  // namespace ws
 }  // namespace mus