Add constants and primitive type readonly attributes to Python IDL compiler

Source/bindings/scripts/deprecated_code_generator_v8.pm

Index: Source/bindings/scripts/deprecated_code_generator_v8.pm
diff --git a/Source/bindings/scripts/deprecated_code_generator_v8.pm b/Source/bindings/scripts/deprecated_code_generator_v8.pm
index 94e8d565aada16440defda6056c92815ee6a3687..8370500d691d2cddf38a656570682d8b71fc7079 100644
--- a/Source/bindings/scripts/deprecated_code_generator_v8.pm
+++ b/Source/bindings/scripts/deprecated_code_generator_v8.pm
@@ -4153,7 +4153,7 @@ END
             $code .= <<END;
     {"${name}", $value},
 END
-            $code .= "#endif\n" if $conditionalString;
+            $code .= "#endif // $conditionalString\n" if $conditionalString;
         }
     }
     if ($has_constants) {
@@ -5981,7 +5981,7 @@ sub GenerateCompileTimeCheckForEnumsIfNeeded
                 push(@checks, "COMPILE_ASSERT($value == ${implClassName}::$name, ${implClassName}Enum${name}IsWrongUseDoNotCheckConstants);\n");
             }
 
-            push(@checks, "#endif\n") if $conditionalString;
+            push(@checks, "#endif // $conditionalString\n") if $conditionalString;
         }
         push(@checks, "\n");
     }