Add missing header files to GN files

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_factory.h",
     "gl_init_export.h",
     "gl_initializer.h",
   ]
   defines = [ "GL_INIT_IMPLEMENTATION" ]
 
   deps = [
     "//base",
     "//ui/gfx",
   ]
 
@@ skipping 35 matching lines @@
   } else if (use_ozone) {
     sources += [
       "gl_factory_ozone.cc",
       "gl_initializer_ozone.cc",
       "ozone_util.h",
     ]
 
     deps += [ "//ui/ozone" ]
   }
 }