Enable CursorManager::LockCursor to lock cursor visibility.

ui/aura/root_window_host_linux.h

Index: ui/aura/root_window_host_linux.h
diff --git a/ui/aura/root_window_host_linux.h b/ui/aura/root_window_host_linux.h
index 6858eeb994442c5e65809914790a2c0d2941487a..808475f2dacec900257c0e2fe5334648e41531c3 100644
--- a/ui/aura/root_window_host_linux.h
+++ b/ui/aura/root_window_host_linux.h
@@ -57,7 +57,6 @@ class RootWindowHostLinux : public RootWindowHost,
   virtual void SetCapture() OVERRIDE;
   virtual void ReleaseCapture() OVERRIDE;
   virtual void SetCursor(gfx::NativeCursor cursor_type) OVERRIDE;
-  virtual void ShowCursor(bool show) OVERRIDE;
   virtual bool QueryMouseLocation(gfx::Point* location_return) OVERRIDE;
   virtual bool ConfineCursorToRootWindow() OVERRIDE;
   virtual void UnConfineCursor() OVERRIDE;
@@ -98,12 +97,6 @@ class RootWindowHostLinux : public RootWindowHost,
   // Is the window mapped to the screen?
   bool window_mapped_;
 
-  // Is the cursor currently shown?
-  bool cursor_shown_;
-
-  // The invisible cursor.
-  ui::XScopedCursor invisible_cursor_;
-
   // The bounds of |xwindow_|.
   gfx::Rect bounds_;