Enable CursorManager::LockCursor to lock cursor visibility.

ui/views/widget/desktop_root_window_host_linux.h

Index: ui/views/widget/desktop_root_window_host_linux.h
diff --git a/ui/views/widget/desktop_root_window_host_linux.h b/ui/views/widget/desktop_root_window_host_linux.h
index a3223539e54acc780722bad02891da5e6af507cd..b7d0c917d40d3b438d1d1584a4d07277d88aa8aa 100644
--- a/ui/views/widget/desktop_root_window_host_linux.h
+++ b/ui/views/widget/desktop_root_window_host_linux.h
@@ -146,7 +146,6 @@ class VIEWS_EXPORT DesktopRootWindowHostLinux
   virtual void SetCapture() OVERRIDE;
   virtual void ReleaseCapture() OVERRIDE;
   virtual void SetCursor(gfx::NativeCursor cursor) OVERRIDE;
-  virtual void ShowCursor(bool show) OVERRIDE;
   virtual bool QueryMouseLocation(gfx::Point* location_return) OVERRIDE;
   virtual bool ConfineCursorToRootWindow() OVERRIDE;
   virtual void UnConfineCursor() OVERRIDE;
@@ -161,8 +160,11 @@ class VIEWS_EXPORT DesktopRootWindowHostLinux
 
   // Overridden from aura::CursorClient:
   // Note: other methods are just set on aura::RootWindowHost:
+  virtual void ShowCursor(bool show) OVERRIDE;
   virtual bool IsCursorVisible() const OVERRIDE;
   virtual void SetDeviceScaleFactor(float device_scale_factor) OVERRIDE;
+  virtual void LockCursor() OVERRIDE;
+  virtual void UnlockCursor() OVERRIDE;
 
   // Overridden from views::internal::InputMethodDelegate:
   virtual void DispatchKeyEventPostIME(const ui::KeyEvent& key) OVERRIDE;