Add {Lock,Unlock,Show,Hide}Cursor() to the window manager mojom.

services/ui/ws/window_tree.cc

Index: services/ui/ws/window_tree.cc
diff --git a/services/ui/ws/window_tree.cc b/services/ui/ws/window_tree.cc
index 511a495c93d9e1159234e74f0a1f06b2825c9de6..7d9e916bcc631e1a1554958493f21841a821dbee 100644
--- a/services/ui/ws/window_tree.cc
+++ b/services/ui/ws/window_tree.cc
@@ -2307,6 +2307,37 @@ void WindowTree::WmSetNonClientCursor(uint32_t window_id,
   window->SetNonClientCursor(std::move(cursor));
 }
 
+void WindowTree::WmLockCursor() {
+  DCHECK(window_manager_state_);
+  for (Display* display : display_manager()->displays())
+    display->LockCursor();
+}
+
+void WindowTree::WmUnlockCursor() {
+  DCHECK(window_manager_state_);
+  for (Display* display : display_manager()->displays())
+    display->UnlockCursor();
+}
+
+void WindowTree::WmShowCursor() {
+  DCHECK(window_manager_state_);
+  for (Display* display : display_manager()->displays())
+    display->ShowCursor();
+}
+
+void WindowTree::WmHideCursor() {
+  DCHECK(window_manager_state_);
+  for (Display* display : display_manager()->displays())
+    display->HideCursor();
+}
+
+void WindowTree::WmSetGlobalOverrideCursor(
+    base::Optional<ui::CursorData> cursor) {
+  DCHECK(window_manager_state_);
+  for (Display* display : display_manager()->displays())
+    display->SetGlobalOverrideCursor(cursor);
+}
+
 void WindowTree::OnWmCreatedTopLevelWindow(uint32_t change_id,
                                            Id transport_window_id) {
   ServerWindow* window =