Use unions for interface control messages.

mojo/public/tools/bindings/generators/java_templates/interface_definition.tmpl

 {% from "constant_definition.tmpl" import constant_def %}
 {% from "enum_definition.tmpl" import enum_def %}
 {% from "data_types_definition.tmpl" import struct_def %}
 
 {%- macro declare_params(parameters, boxed=false) %}
 {%-   for param in parameters -%}
 {{param.kind|java_type(boxed)}} {{param|name}}
 {%- if not loop.last %}, {% endif %}
 {%-   endfor %}
 {%- endmacro %}
@@ skipping 73 matching lines @@
 {%- macro accept_body(interface, with_response) -%}
 try {
     org.chromium.mojo.bindings.ServiceMessage messageWithHeader =
             message.asServiceMessage();
     org.chromium.mojo.bindings.MessageHeader header = messageWithHeader.getHeader();
     if (!header.validateHeader({{flags(with_response, True)}})) {
         return false;
     }
     switch(header.getType()) {
 {%   if with_response %}
-        case org.chromium.mojo.bindings.InterfaceControlMessagesConstants.RUN_MESSAGE_ID:
+        case org.chromium.mojo.bindings.interfacecontrol.InterfaceControlMessagesConstants.RUN_MESSAGE_ID:
             return org.chromium.mojo.bindings.InterfaceControlMessagesHelper.handleRun(
                     getCore(), {{interface|name}}_Internal.MANAGER, messageWithHeader, receiver);
 {%   else %}
-        case org.chromium.mojo.bindings.InterfaceControlMessagesConstants.RUN_OR_CLOSE_PIPE_MESSAGE_ID:
+        case org.chromium.mojo.bindings.interfacecontrol.InterfaceControlMessagesConstants.RUN_OR_CLOSE_PIPE_MESSAGE_ID:
             return org.chromium.mojo.bindings.InterfaceControlMessagesHelper.handleRunOrClosePipe(
                     {{interface|name}}_Internal.MANAGER, messageWithHeader);
 {%   endif %}
 {%   for method in interface.methods %}
 {%     if (with_response and method.response_parameters != None) or
         (not with_response and method.response_parameters == None) %}
 {%       set request_struct = method.param_struct %}
 {%       if with_response %}
 {%         set response_struct = method.response_param_struct %}
 {%       endif %}
@@ skipping 169 matching lines @@
                                     {{flags_for_method(method, False)}},
                                     mRequestId));
             mMessageReceiver.accept(_message);
         }
     }
 {%   endif %}
 {% endfor %}
 
 }
 {% endmacro %}