Mojo bindings: Fix typemap includes.

mojo/public/tools/bindings/generators/cpp_templates/module-internal.h.tmpl

 // Copyright 2013 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.
 
 {%- if variant -%}
 {%-   set variant_path = "%s-%s"|format(module.path, variant) -%}
 {%- else -%}
 {%-   set variant_path = module.path -%}
 {%- endif -%}
 
 {%- set header_guard = "%s_INTERNAL_H_"|format(
         variant_path|upper|replace("/","_")|replace(".","_")|
             replace("-", "_")) %}
 
 #ifndef {{header_guard}}
 #define {{header_guard}}
 
 #include "mojo/public/cpp/bindings/lib/bindings_internal.h"
 #include "mojo/public/cpp/bindings/lib/buffer.h"
 #include "mojo/public/cpp/bindings/lib/serialization.h"
 #include "mojo/public/cpp/bindings/lib/union_accessor.h"
 #include "mojo/public/cpp/bindings/lib/value_traits.h"
 #include "mojo/public/cpp/bindings/struct_ptr.h"
-{%- for header in extra_headers %}
-#include "{{header}}"
-{%- endfor %}
 
 {%- for import in imports %}
 {%-   if variant %}
 #include "{{"%s-%s-internal.h"|format(import.module.path, variant)}}"
 {%-   else %}
 #include "{{import.module.path}}-internal.h"
 {%-   endif %}
 {%- endfor %}
 
 namespace mojo {
@@ skipping 66 matching lines @@
 
 }  // namespace internal
 {%- if variant %}
 }  // namespace {{variant}}
 {%- endif %}
 {%- for namespace in namespaces_as_array|reverse %}
 }  // namespace {{namespace}}
 {%- endfor %}
 
 #endif  // {{header_guard}}