Add OzoneGLImpl interface.

ui/ozone/BUILD.gn

 # 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.
 
 import("//build/config/ui.gni")
 import("//ui/ozone/ozone.gni")
 import("//testing/test.gni")
 
 assert(use_ozone)
 
@@ skipping 49 matching lines @@
   if (use_vgem_map) {
     defines = [ "USE_VGEM_MAP" ]
   }
 }
 
 # GYP version: ui/ozone/ozone.gyp:ozone_base
 component("ozone_base") {
   sources = [
     "public/cursor_factory_ozone.cc",
     "public/cursor_factory_ozone.h",
+    "public/gl_ozone.h",
     "public/gpu_platform_support_host.cc",
     "public/gpu_platform_support_host.h",
     "public/input_controller.cc",
     "public/input_controller.h",
     "public/native_pixmap.h",
     "public/overlay_candidates_ozone.cc",
     "public/overlay_candidates_ozone.h",
     "public/overlay_manager_ozone.h",
     "public/ozone_switches.cc",
     "public/ozone_switches.h",
@@ skipping 149 matching lines @@
     "//ui/gfx/geometry",
   ]
 
   # Add tests of platform internals.
   deps += ozone_platform_test_deps
 
   # Platform tests link ozone statically. Make sure we're not getting a
   # 2nd copy of any code via the component.
   assert_no_deps = [ "//ui/ozone" ]
 }