Add name to services

mojo/public/tools/bindings/generators/cpp_templates/interface_declaration.tmpl

 {%- import "interface_macros.tmpl" as interface_macros %}
 class {{interface.name}}Proxy;
 class {{interface.name}}Stub;
 
 class {{interface.name}}RequestValidator;
 {%- if interface|has_callbacks %}
 class {{interface.name}}ResponseValidator;
 {%- endif %}
 {% if interface.client %}
 class {{interface.client}};
 {% endif %}
 
 class {{interface.name}} {
  public:
+  static const char* Name_;
+
   typedef {{interface.name}}Proxy Proxy_;
   typedef {{interface.name}}Stub Stub_;
 
   typedef {{interface.name}}RequestValidator RequestValidator_;
 {%- if interface|has_callbacks %}
   typedef {{interface.name}}ResponseValidator ResponseValidator_;
 {%- else %}
   typedef mojo::PassThroughFilter ResponseValidator_;
 {%- endif %}
 {% if interface.client %}
@@ skipping 13 matching lines @@
   {{enum_def()|indent(2)}}
 {%- endfor %}
 
 {#--- Methods #}
   virtual ~{{interface.name}}() {}
 
 {%- for method in interface.methods %}
   virtual void {{method.name}}({{interface_macros.declare_request_params("", method)}}) = 0;
 {%- endfor %}
 };