[V8] Generate a wrapper function for method callbacks

[Kentaro Hara]

This is one of steps to insert TRACE_EVENT_STATE() macros into DOM bindings. This patch introduces an indirection function for xxxMethod(), like this:

// For non-custom methods
void xxxMethodCallback(...) {
  xxxMethod(...);
}

// For custom methods
void xxxMethodCallback(...) {
  return xxxMethodCustom(...);
}

[Kentaro Hara]

Created attachment 190097 [details]
Patch

[Kentaro Hara]

Comment on attachment 190097 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=190097&action=review

> Source/WebCore/bindings/scripts/CodeGeneratorV8.pm:1473
> -sub GenerateOverloadedFunctionCallback
> +sub GenerateOverloadedFunction

The diff is confusing, but basically I just factored ${name}MethodCallback() out of GenerateOverloadedFunctionCallback().

> Source/WebCore/bindings/scripts/CodeGeneratorV8.pm:1533
> +        push(@implContentDecls, "    return ${v8InterfaceName}::${name}MethodCustom(args);\n");
> +    } else {
> +        push(@implContentDecls, "    return ${interfaceName}V8Internal::${name}Method(args);\n");
> +    }

And this is the essential part of the patch. Other diffs are just for making this part workable.

[Kentaro Hara]

Committed r143967: <http://trac.webkit.org/changeset/143967>