Use C bindings to Mojo GL entry points exclusively.

mojo/skia/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.
 
-static_library("skia") {
+source_set("skia") {
   sources = [
     "ganesh_context.cc",
     "ganesh_context.h",
     "ganesh_framebuffer_surface.cc",
     "ganesh_framebuffer_surface.h",
     "ganesh_texture_surface.cc",
     "ganesh_texture_surface.h",
   ]
 
   deps = [
+    ":skia_bindings",
     "//base",
-    "//gpu/command_buffer/client:gles2_c_lib",
-    "//gpu/skia_bindings",
     "//mojo/gpu",
+    "//mojo/public/c/gpu",
+    "//mojo/public/c/gpu:MGL",
     "//skia",
   ]
 }
+
+source_set("skia_bindings") {
+  sources = [
+    "gl_bindings_skia.cc",
+    "gl_bindings_skia.h",
+  ]
+  deps = [
+    "//mojo/public/c/gpu",
+    "//mojo/public/c/gpu:GLES2",
+    "//skia",
+  ]
+}