Fix java bindings with array of maps.

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

Index: mojo/public/tools/bindings/generators/java_templates/struct_definition.tmpl
diff --git a/mojo/public/tools/bindings/generators/java_templates/struct_definition.tmpl b/mojo/public/tools/bindings/generators/java_templates/struct_definition.tmpl
index cfc66915e92648d2efc718a756657b8323c36801..0abdac421b5c6b55d4eb514bde178307dd9aea4a 100644
--- a/mojo/public/tools/bindings/generators/java_templates/struct_definition.tmpl
+++ b/mojo/public/tools/bindings/generators/java_templates/struct_definition.tmpl
@@ -142,6 +142,7 @@ if (decoder{{level+1}} == null) {
         return decode(new org.chromium.mojo.bindings.Decoder(message));
     }
 
+    @SuppressWarnings("unchecked")
     public static {{struct|name}} decode(org.chromium.mojo.bindings.Decoder decoder0) {
         if (decoder0 == null) {
             return null;
@@ -162,6 +163,7 @@ if (decoder{{level+1}} == null) {
         return result;
     }
 
+    @SuppressWarnings("unchecked")
     @Override
     protected final void encode(org.chromium.mojo.bindings.Encoder encoder) {
 {% if not struct.bytes %}