Experiment with typemaps in Blink Modules

mojo/public/tools/bindings/blink_bindings_configuration.gni

 # 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.
 
 variant = "blink"
 
 for_blink = true
 
 _typemap_imports = [
   "//mojo/public/cpp/bindings/tests/blink_typemaps.gni",
+  "//third_party/WebKit/Source/modules/module_typemaps.gni",
   "//third_party/WebKit/Source/platform/mojo/blink_typemaps.gni",
   "//third_party/WebKit/public/blink_typemaps.gni",
   "//third_party/WebKit/public/public_typemaps.gni",
 ]
 _typemaps = []
 
 foreach(typemap_import, _typemap_imports) {
   # Avoid reassignment error by assigning to empty scope first.
   _imported = {
   }
   _imported = read_file(typemap_import, "scope")
   _typemaps += _imported.typemaps
 }
 
 typemaps = []
 foreach(typemap, _typemaps) {
   typemaps += [ {
         filename = typemap
         config = read_file(typemap, "scope")
       } ]
 }
 
 blacklist = []