Some tweaks to the styles to make it better match Xcode 8's new look.
<rdar://problem/27376501>
Created attachment 283775 [details] Screenshot with Patch Applied
Created attachment 283776 [details] Patch
Comment on attachment 283776 [details] Patch rs=me
Comment on attachment 283776 [details] Patch https://trac.webkit.org/r203290
Follow-up to further improve matching with Xcode 8: https://bugs.webkit.org/show_bug.cgi?id=159849