Move static GL binding initialization to //ui/gl/init.

ui/gl/init/BUILD.gn

 # 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.
 
 import("//build/config/ui.gni")
 
 component("init") {
   output_name = "gl_init"
 
   public = [
     "gl_factory.h",
   ]
 
   sources = [
     "gl_factory.cc",
     "gl_init_export.h",
     "gl_initializer.h",
   ]
   defines = [ "GL_INIT_IMPLEMENTATION" ]
 
+  include_dirs = [ "//third_party/swiftshader/include" ]
+
   deps = [
     "//base",
     "//ui/gfx",
   ]
 
   public_deps = [
     "//ui/gl",
   ]
 
   if (is_android) {
@@ skipping 22 matching lines @@
     sources += [
       "gl_factory_ozone.cc",
       "gl_initializer_ozone.cc",
       "gl_surface_ozone.cc",
       "gl_surface_ozone.h",
     ]
 
     deps += [ "//ui/ozone" ]
   }
 }