Web Inspector: Improve handling of Bound functions in samples

[Joseph Pecoraro]

Created attachment 274968 [details]
[IMAGE] Call Tree with "bound" clutter

* SUMMARY
Improve handling of Bound functions in samples.

Currently bound functions show up in the sample twice. The "[N] bound foo" and its immediate call to "[ƒ] foo". Ending up with:

    [ƒ] doStuff
      [N] bound foo
        [ƒ] foo
          [N] bound foo
            [ƒ] foo

Note we do not show these bound functions in our call stack. If we were paused in the inner foo here we would have a call stack like:

    [ƒ] foo
    [ƒ] foo
    [ƒ] doStuff

So the profile here could be:

    [ƒ] doStuff
      [ƒ] foo
        [ƒ] foo

Or:

    [ƒ] doStuff
      [ƒ] bound foo
        [ƒ] bound foo

Removing a bunch of extra, unnecessary duplication in the call tree.

* TEST
<script>
setInterval(function() { // anonymous
    (function foo() { // bound foo => foo
        var until = Date.now() + 2;
        while (Date.now() <= until);
        console.log(Date.now());
    }).bind(null)()
}, 1000);
</script>

[Radar WebKit Bug Importer]

<rdar://problem/25371989>