Implement GLX for Ozone X11.

ui/ozone/platform/x11/x11_surface_factory.h

 // Copyright 2016 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_PLATFORM_X11_X11_SURFACE_FACTORY_H_
 #define UI_OZONE_PLATFORM_X11_X11_SURFACE_FACTORY_H_
 
 #include <memory>
 
 #include "ui/ozone/public/surface_factory_ozone.h"
 
 namespace ui {
 
 // Handles creation of EGL and software surfaces for drawing in XWindow.
 class X11SurfaceFactory : public SurfaceFactoryOzone {
  public:
   X11SurfaceFactory();
   ~X11SurfaceFactory() override;
 
   // SurfaceFactoryOzone:
 
   std::unique_ptr<SurfaceOzoneEGL> CreateEGLSurfaceForWidget(
       gfx::AcceleratedWidget widget) override;
   bool LoadEGLGLES2Bindings(
       AddGLLibraryCallback add_gl_library,
       SetGLGetProcAddressProcCallback set_gl_get_proc_address) override;
   intptr_t GetNativeDisplay() override;
+  bool SupportsGLX() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(X11SurfaceFactory);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_X11_X11_SURFACE_FACTORY_H_