mojom: Add associative arrays to the mojom language.

mojo/public/tools/bindings/generators/cpp_templates/module.cc.tmpl

Index: mojo/public/tools/bindings/generators/cpp_templates/module.cc.tmpl
diff --git a/mojo/public/tools/bindings/generators/cpp_templates/module.cc.tmpl b/mojo/public/tools/bindings/generators/cpp_templates/module.cc.tmpl
index 8f5e81233dd37ed68930614a67e1e7f00845c0b1..f003b1e33a0e7e1628acf5e9106b0d17bad3f6a1 100644
--- a/mojo/public/tools/bindings/generators/cpp_templates/module.cc.tmpl
+++ b/mojo/public/tools/bindings/generators/cpp_templates/module.cc.tmpl
@@ -18,8 +18,11 @@
 #include "mojo/public/cpp/bindings/lib/array_serialization.h"
 #include "mojo/public/cpp/bindings/lib/bindings_serialization.h"
 #include "mojo/public/cpp/bindings/lib/bounds_checker.h"
+#include "mojo/public/cpp/bindings/lib/map_data_internal.h"
+#include "mojo/public/cpp/bindings/lib/map_serialization.h"
 #include "mojo/public/cpp/bindings/lib/message_builder.h"
 #include "mojo/public/cpp/bindings/lib/string_serialization.h"
+#include "mojo/public/cpp/bindings/lib/validate_params.h"
 #include "mojo/public/cpp/bindings/lib/validation_errors.h"
 
 {%- for namespace in namespaces_as_array %}