Add UserContent API to WebKit2 InjectedBundle

[Sam Weinig]

Add UserContent API to WebKit2 InjectedBundle. In the first pass, I will only add it to the InjectedBundle, but we can consider whether we want to provide a convenient  way of doing much of this from the UIProcess if this turns out to be too cumbersome.

[Sam Weinig]

Created attachment 65802 [details]
Patch

[Sam Weinig]

<rdar://problem/8367587>

Comment on attachment 65802 [details]
Patch

> +static PassOwnPtr<Vector<String> > toStringVector(ImmutableArray* patterns)
> +{
> +    size_t size =  patterns->size();
> +    if (!size)
> +        return 0;
> +
> +    Vector<String>* patternsVector = new Vector<String>;

Reserve initial capacity here…

> +    for (size_t i = 0; i < size; ++i) {
> +        WebString* entry = patterns->at<WebString>(i);
> +        if (entry)
> +            patternsVector->append(entry->string());

…unchecked append here.

[Sam Weinig]

Landed in r66292.