Implement GLX for Ozone X11.

ui/ozone/public/surface_factory_ozone.h

 // Copyright (c) 2013 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_PUBLIC_SURFACE_FACTORY_OZONE_H_
 #define UI_OZONE_PUBLIC_SURFACE_FACTORY_OZONE_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 97 matching lines @@
       gfx::BufferFormat format,
       gfx::BufferUsage usage);
 
   // Create a single native buffer from an existing handle. Takes ownership of
   // |handle| and can be called on any thread.
   virtual scoped_refptr<NativePixmap> CreateNativePixmapFromHandle(
       gfx::Size size,
       gfx::BufferFormat format,
       const gfx::NativePixmapHandle& handle);
 
+  // Returns true if the Ozone platform supports GLX.

[rjkroege, 2016/04/27 19:08:12]

I think that I'm opposed to introducing this into the top-level API. It is a
platform-specific detail that should ideally be abstracted.

[kylechar, 2016/04/27 19:36:32]

Yes, I think that is the better approach. There is a way to do it but it
requires big refactoring, see my other comment.

+  virtual bool SupportsGLX();
+
  protected:
   SurfaceFactoryOzone();
   virtual ~SurfaceFactoryOzone();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SurfaceFactoryOzone);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PUBLIC_SURFACE_FACTORY_OZONE_H_