Update SKP version

Automatic commit by the RecreateSKPs bot.

TBR=

Review URL: https://codereview.chromium.org/732443002
Cleanup the XML directory in public includes.

Review URL: https://codereview.chromium.org/722343002
Replace GrResourceCache with GrResourceCache2.

BUG=skia:2889

Committed: https://skia.googlesource.com/skia/+/66a450f21a3da174b7eed89a1d5fc8591e8b6ee6

Review URL: https://codereview.chromium.org/716143004
Revert of Replace GrResourceCache with GrResourceCache2. (patchset #7 id:120001 of https://codereview.chromium.org/716143004/)

Reason for revert:
broken again

Original issue's description:
> Replace GrResourceCache with GrResourceCache2.
>
> BUG=skia:2889
>
> Committed: https://skia.googlesource.com/skia/+/66a450f21a3da174b7eed89a1d5fc8591e8b6ee6
>
> Committed: https://skia.googlesource.com/skia/+/407aa584d183c1bf314f5defd1cf0202e8a96c89

TBR=robertphillips@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:2889

Review URL: https://codereview.chromium.org/726913002
Move WGL header from include to src

NOTRY=true

Review URL: https://codereview.chromium.org/728823002
Steal ASAN skimage expectations for UBSAN.

NOTRY=true

BUG=skia:3096

Review URL: https://codereview.chromium.org/731553002
Optimize SkAlphaMulQ_SSE2

These two mask clear are useless, because _mm_srli_epi16 fills high byte
of each word with 0.

BUG=skia:

Review URL: https://codereview.chromium.org/724333003
add gm for 2-rects and blur

BUG=skia:
TBR=

Review URL: https://codereview.chromium.org/728863002
Don't pass null to memcmp.

This will allow us to add nonnull-attribute to the UBSAN bot.

We are in fact hitting a case where one of the arguments is null and the other
not, which seems dicey.  I think the scenario is comparing the empty pathref
with another path ref that's just been COWed, without any verbs or points yet.

BUG=skia:

Review URL: https://codereview.chromium.org/732643002
Enforce pure virtual behavior for onMatchFamilyStyleCharacter

All impls that previously did not define the functions have been
updated to return NULL.

NOTRY=true

Review URL: https://codereview.chromium.org/728873002
Enable unused param checking for public includes.

This CL cleans up the existing violations and enables the
build time check to ensure that we don't regress.

The motiviation behind this change is to allow clients who include
our headers to be able to build with this warning enabled.

Review URL: https://codereview.chromium.org/726923002
Fix ref-cnting bug in GrContext::readRenderTargetPixels

TBR=egdaniel@google.com
NOTRY=true

Review URL: https://codereview.chromium.org/732713002
Experimental: NewSkPDFBackend, multipage_pdf_profiler

NewSkPDFBackend in the experimental/ directory, enabled with GYP
setting.

multipage_pdf_profiler executable in experimental/tools/ directory,
for justifying why we need a new SkPDF backend.