Revert of XPS, DM: add SkDocument::CreateXPS

Revert of XPS, DM: add SkDocument::CreateXPS (patchset #8 id:310001 of https://codereview.chromium.org/963953002/)

Reason for revert:
breaking iOS build.

Original issue's description:
> XPS, DM: add SkDocument::CreateXPS
> 
> -   SkDocument::CreateXPS() function added, returns NULL on non-Windows OS.
> 
> -   DM: (Windows only) an XPSSink is added, fails on non-Windows OS
> 
> -   DM: Common code for PDFSink::draw and XPSSink::draw are factored into
>     draw_skdocument static function.
> 
> -   SkDocument_XPS (Windows only) implementation of SkDocument via
>     SkXPSDevice.
> 
> -   SkDocument_XPS_None (non-Windows) returns NULL for
>     SkDocument::CreateXPS().
> 
> -   gyp/xps.gyp refactored.
> 
> -   SkXPSDevice::drawTextOnPath removed (see http://crrev.com/925343003 )
> 
> -   SkXPSDevice::drawPath supports conics via SkAutoConicToQuads.
> 
> NOPRESUBMIT=true
> 
> Committed: https://skia.googlesource.com/skia/+/00d39bcbfc8394a9b48b86b04ab06ec19091fa43

TBR=reed@google.com,bungeman@google.com,mtklein@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://skia.googlesource.com/skia/+/c2574f3657b1359496a4eba5b191961974b3a64f

[hal.canary, 2015-03-03 16:33:36]

Created Revert of XPS, DM: add SkDocument::CreateXPS

[commit-bot: I haz the power, 2015-03-03 16:34:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/978443002/1

[commit-bot: I haz the power, 2015-03-03 16:34:18]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/c2574f3657b1359496a4eba5b191961974b3a64f