mus: Implement ScreenMus::GetCursorScreenPoint().

components/mus/ws/window_tree.cc

 // 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.
 
 #include "components/mus/ws/window_tree.h"
 
 #include <stddef.h>
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/stl_util.h"
 #include "components/mus/ws/default_access_policy.h"
 #include "components/mus/ws/display.h"
 #include "components/mus/ws/display_manager.h"
 #include "components/mus/ws/event_matcher.h"
 #include "components/mus/ws/focus_controller.h"
 #include "components/mus/ws/operation.h"
 #include "components/mus/ws/platform_display.h"
 #include "components/mus/ws/server_window.h"
 #include "components/mus/ws/server_window_observer.h"
+#include "components/mus/ws/user_display_manager.h"
 #include "components/mus/ws/window_manager_state.h"
 #include "components/mus/ws/window_server.h"
 #include "components/mus/ws/window_tree_binding.h"
 #include "mojo/converters/geometry/geometry_type_converters.h"
 #include "mojo/converters/ime/ime_type_converters.h"
 #include "mojo/converters/input_events/input_events_type_converters.h"
 #include "mojo/converters/surfaces/surfaces_type_converters.h"
 #include "ui/platform_window/text_input_state.h"
 
 using mojo::Array;
@@ skipping 1290 matching lines @@
     mojo::AssociatedInterfaceRequest<mojom::WindowManagerClient> internal) {
   if (!access_policy_->CanSetWindowManager() || !window_manager_internal_ ||
       window_manager_internal_client_binding_) {
     return;
   }
   window_manager_internal_client_binding_.reset(
       new mojo::AssociatedBinding<mojom::WindowManagerClient>(
           this, std::move(internal)));
 }
 
+void WindowTree::GetCursorLocationMemory(
+    const GetCursorLocationMemoryCallback& callback) {
+  callback.Run(
+      window_server_->display_manager()->GetUserDisplayManager(user_id_)->
+      GetCursorLocationMemory());
+}
+
 void WindowTree::AddAccelerator(uint32_t id,
                                 mojom::EventMatcherPtr event_matcher,
                                 const AddAcceleratorCallback& callback) {
   WindowManagerState* wms = GetWindowManagerStateForWindowManager();
   const bool success =
       wms->event_dispatcher()->AddAccelerator(id, std::move(event_matcher));
   callback.Run(success);
 }
 
 void WindowTree::RemoveAccelerator(uint32_t id) {
@@ skipping 87 matching lines @@
 }
 
 bool WindowTree::IsWindowRootOfAnotherTreeForAccessPolicy(
     const ServerWindow* window) const {
   WindowTree* tree = window_server_->GetTreeWithRoot(window);
   return tree && tree != this;
 }
 
 }  // namespace ws
 }  // namespace mus