Mojo: Support enums as map keys in WTF

mojo/public/tools/bindings/generators/cpp_templates/module.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 -%}
 
@@ skipping 68 matching lines @@
 {%- endif %}
 
 {%- for header in extra_public_headers %}
 #include "{{header}}"
 {%- endfor %}
 
 {%- if export_header %}
 #include "{{export_header}}"
 {%- endif %}
 
+{#--- WTF enum hashing #}
+{%- from "enum_macros.tmpl" import enum_hash_blink%}
+{%- if for_blink %}
+{%-   for enum in all_enums %}
+{%-     if not enum|is_native_only_kind %}
+{{enum_hash_blink(enum)}}
+{%-     endif %}
+{%-   endfor %}
+{%- endif %}
+
 {{namespace_begin()}}
 
 {#--- Enums #}
 {%- if variant %}
 {%-   for enum in enums %}
 using {{enum.name}} = {{enum.name}};  // Alias for definition in the parent namespace.
 {%-   endfor %}
 {%- endif %}
 
 {#--- Constants #}
@@ skipping 117 matching lines @@
 {#--- Union Serialization Helpers -#}
 {%  if unions %}
 {%-   for union in unions %}
 {%      include "union_traits_declaration.tmpl" %}
 {%-   endfor %}
 {%- endif %}
 
 }  // namespace mojo
 
 #endif  // {{header_guard}}