Add callbacks to register EGL bindings from Ozone

ui/gfx/ozone/impl/software_surface_factory_ozone.cc

 // Copyright 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.
 
 #include "ui/gfx/ozone/impl/software_surface_factory_ozone.h"
 
 #include <drm.h>
 #include <errno.h>
 #include <xf86drm.h>
 
@@ skipping 168 matching lines @@
   // with the hardware CRTC such that we can show the buffers. The controller
   // takes ownership of the surface.
   if (!controller_->BindSurfaceToController(surface.Pass())) {
     LOG(ERROR) << "Failed to bind surface to controller";
     return gfx::kNullAcceleratedWidget;
   }
 
   return reinterpret_cast<gfx::AcceleratedWidget>(controller_->get_surface());
 }
 
-bool SoftwareSurfaceFactoryOzone::LoadEGLGLES2Bindings() {
+bool SoftwareSurfaceFactoryOzone::LoadEGLGLES2Bindings(
+      AddGLLibraryCallback add_gl_library,
+      SetGLGetProcAddressProcCallback set_gl_get_proc_address) {
   return false;
 }
 
 bool SoftwareSurfaceFactoryOzone::AttemptToResizeAcceleratedWidget(
     gfx::AcceleratedWidget w,
     const gfx::Rect& bounds) {
   return false;
 }
 
 bool SoftwareSurfaceFactoryOzone::SchedulePageFlip(gfx::AcceleratedWidget w) {
@@ skipping 104 matching lines @@
   drmEventContext drm_event;
   drm_event.version = DRM_EVENT_CONTEXT_VERSION;
   drm_event.page_flip_handler = HandlePageFlipEvent;
   drm_event.vblank_handler = NULL;
 
   // Wait for the page-flip to complete.
   drmHandleEvent(fd, &drm_event);
 }
 
 }  // namespace gfx