This code was removed in r170208.

—Myles
> On Jun 18, 2014, at 4:23 PM, Dean Jackson <d...@apple.com> wrote:
> 
> The Loop-Blinn code is dead and should be removed from WebKit. I believe Ken 
> Russell implemented it to help with some Chrome/Skia drawing performance, but 
> since then Skia itself updated to use a similar GPU-accelerated approach.
> 
> Dean
> 
> On 18 Jun 2014, at 6:07 pm, Michael IV <explomas...@gmail.com> wrote:
> 
>> Hi All.I have been investigating into WebKit text rendering details and I 
>> found Loop-Blinn implementation in GPU directory of WebCore.I have tested it 
>> and it kind of works ok for convex shapes rendering which probably should be 
>> ok for text glyphs outline as well.
>> But I have got a couple of question regarding this module:
>> 1)Is it used by the browsers to render text or 2d shapes?
>> 2)Is it actually ready for real-life usage?
>> 3)How anti  aliasing is handled?I mean ,I found that only curves are 
>> anti-aliased(internally by the shader) but the straight line outlines need 
>> proper MSAA which can be pretty expensive or even unavailable  on some 
>> platforms.
>> 
>> Also I found a bug: when drawing a path with two overlapping convex shapes 
>> ,the hole created on the overlap region which is aliased.
>> -- 
>> 
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> 
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