Enable CursorManager::LockCursor to lock cursor visibility.

ui/aura/remote_root_window_host_win.cc

Index: ui/aura/remote_root_window_host_win.cc
diff --git a/ui/aura/remote_root_window_host_win.cc b/ui/aura/remote_root_window_host_win.cc
index de3ccd865375fbf9a654f05fd796727911eaea3f..619b783eb5d32c03d45e8b9b0fde3c6b167ddb20 100644
--- a/ui/aura/remote_root_window_host_win.cc
+++ b/ui/aura/remote_root_window_host_win.cc
@@ -94,9 +94,6 @@ void RemoteRootWindowHostWin::SetCapture() {
 void RemoteRootWindowHostWin::ReleaseCapture() {
 }
 
-void RemoteRootWindowHostWin::ShowCursor(bool show) {
-}
-
 bool RemoteRootWindowHostWin::QueryMouseLocation(gfx::Point* location_return) {
   POINT pt;
   GetCursorPos(&pt);
@@ -156,4 +153,3 @@ void RemoteRootWindowHostWin::OnMouseClick(int x, int y, int extra) {
 }
 
 }  // namespace aura
-