[Ozone-Demo] Update Surfaceless renderer

ui/ozone/demo/gl_renderer.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_OZONE_DEMO_GL_RENDERER_H_
 #define UI_OZONE_DEMO_GL_RENDERER_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "ui/ozone/demo/renderer_base.h"
 
 namespace gfx {
 class GLContext;
 class GLSurface;
 }  // namespace gfx
 
 namespace ui {
 
 class GlRenderer : public RendererBase {
  public:
   GlRenderer(gfx::AcceleratedWidget widget, const gfx::Size& size);
   ~GlRenderer() override;
 
   // Renderer:
   bool Initialize() override;
   void RenderFrame() override;
 
  protected:
+  virtual scoped_refptr<gfx::GLSurface> CreateSurface();
+
   scoped_refptr<gfx::GLSurface> surface_;
   scoped_refptr<gfx::GLContext> context_;
 
   DISALLOW_COPY_AND_ASSIGN(GlRenderer);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_DEMO_GL_RENDERER_H_