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 351 matching lines @@
 
 void WindowManagerState::ReleaseNativeCapture() {
   platform_display_->ReleaseCapture();
 }
 
 void WindowManagerState::OnServerWindowCaptureLost(ServerWindow* window) {
   DCHECK(window);
   window_server()->ProcessLostCapture(window);
 }
 
+void WindowManagerState::OnMouseCursorLocationChanged(const gfx::Point& point) {
+  window_server()->display_manager()->GetUserDisplayManager(user_id_)->
+      OnMouseCursorLocationChanged(point);
+}
+
 void WindowManagerState::DispatchInputEventToWindow(ServerWindow* target,
                                                     bool in_nonclient_area,
                                                     const ui::Event& event,
                                                     Accelerator* accelerator) {
   DCHECK(IsActive());
   // TODO(sky): this needs to see if another wms has capture and if so forward
   // to it.
   if (event_ack_timer_.IsRunning()) {
     std::unique_ptr<ProcessedEventTarget> processed_event_target(
         new ProcessedEventTarget(target, in_nonclient_area, accelerator));
     QueueEvent(event, std::move(processed_event_target));
     return;
   }
 
   base::WeakPtr<Accelerator> weak_accelerator;
   if (accelerator)
     weak_accelerator = accelerator->GetWeakPtr();
   DispatchInputEventToWindowImpl(target, in_nonclient_area, event,
                                  weak_accelerator);
 }
 
 void WindowManagerState::OnEventTargetNotFound(const ui::Event& event) {
   window_server()->SendToEventObservers(event, user_id_,
                                         nullptr /* ignore_tree */);
 }
 
 }  // namespace ws
 }  // namespace mus