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

ash/mus/bridge/shell_port_mash.cc

Index: ash/mus/bridge/shell_port_mash.cc
diff --git a/ash/mus/bridge/shell_port_mash.cc b/ash/mus/bridge/shell_port_mash.cc
index 5abe4f69cf7e6bb9aa7081a82f6ec0f496708ec7..3b44ae85c9d9d7e13b375d37b6345c4fdda8cefd 100644
--- a/ash/mus/bridge/shell_port_mash.cc
+++ b/ash/mus/bridge/shell_port_mash.cc
@@ -242,13 +242,25 @@ void ShellPortMash::SetDisplayWorkAreaInsets(WmWindow* window,
 }
 
 void ShellPortMash::LockCursor() {
-  // TODO: http://crbug.com/637853
-  NOTIMPLEMENTED();
+  window_manager_->window_manager_client()->LockCursor();
 }
 
 void ShellPortMash::UnlockCursor() {
-  // TODO: http://crbug.com/637853
-  NOTIMPLEMENTED();
+  window_manager_->window_manager_client()->UnlockCursor();
+}
+
+void ShellPortMash::ShowCursor() {
+  window_manager_->window_manager_client()->ShowCursor();
+}
+
+void ShellPortMash::HideCursor() {
+  window_manager_->window_manager_client()->HideCursor();
+}
+
+void ShellPortMash::SetGlobalOverrideCursor(
+    base::Optional<ui::CursorData> cursor) {
+  window_manager_->window_manager_client()->SetGlobalOverrideCursor(
+      std::move(cursor));
 }
 
 bool ShellPortMash::IsMouseEventsEnabled() {