Enable CursorManager::LockCursor to lock cursor visibility.

ui/views/widget/desktop_root_window_host_linux.cc

Index: ui/views/widget/desktop_root_window_host_linux.cc
diff --git a/ui/views/widget/desktop_root_window_host_linux.cc b/ui/views/widget/desktop_root_window_host_linux.cc
index 3b3df6d6030c3427f785f0c2c09978ef426bd51e..25d9846078b04ecd860bdd5f038c7a5f205ba9b6 100644
--- a/ui/views/widget/desktop_root_window_host_linux.cc
+++ b/ui/views/widget/desktop_root_window_host_linux.cc
@@ -682,13 +682,6 @@ void DesktopRootWindowHostLinux::SetCursor(gfx::NativeCursor cursor) {
     SetCursorInternal(cursor);
 }
 
-void DesktopRootWindowHostLinux::ShowCursor(bool show) {
-  if (show == cursor_shown_)
-    return;
-  cursor_shown_ = show;
-  SetCursorInternal(show ? current_cursor_ : invisible_cursor_);
-}
-
 bool DesktopRootWindowHostLinux::QueryMouseLocation(
     gfx::Point* location_return) {
   ::Window root_return, child_return;
@@ -782,6 +775,13 @@ void DesktopRootWindowHostLinux::PrepareForShutdown() {
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopRootWindowHostLinux, aura::CursorClient implementation:
 
+void DesktopRootWindowHostLinux::ShowCursor(bool show) {
+  if (show == cursor_shown_)
+    return;
+  cursor_shown_ = show;
+  SetCursorInternal(show ? current_cursor_ : invisible_cursor_);
+}
+
 bool DesktopRootWindowHostLinux::IsCursorVisible() const {
   return cursor_shown_;
 }
@@ -792,6 +792,16 @@ void DesktopRootWindowHostLinux::SetDeviceScaleFactor(
   cursor_loader_.set_device_scale_factor(device_scale_factor);
 }
 
+void DesktopRootWindowHostLinux::LockCursor() {
+  // TODO(mazda): Implement this.
+  NOTIMPLEMENTED();
+}
+
+void DesktopRootWindowHostLinux::UnlockCursor() {
+  // TODO(mazda): Implement this.
+  NOTIMPLEMENTED();
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopRootWindowHostLinux, views::internal::InputMethodDelegate: