Roll Skia from d438815e853d to 40c906f58e3e (6 revisions)

https://skia.googlesource.com/skia.git/+log/d438815e853d..40c906f58e3e

2021-07-26 csmartdalton@google.com Don't store a GrVertexWriter pointer in GrMiddleOutPolygonTriangulator
2021-07-26 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2021-07-26 fmalita@chromium.org Experimental ICU runtime linking
2021-07-26 robertphillips@google.com Fix build SKNX_NO_SIMD build and G3 roll
2021-07-26 reed@google.com Generalize composing imagefilters and shaders to blenders
2021-07-26 herb@google.com different bytes - same hash

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-skiabot-test-autoroll
Please CC borenet@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Tbr: borenet@google.com
Change-Id: I6013558c6f47e725a834f51fc351499494ad7ed6
Reviewed-on: https://skia-review.googlesource.com/c/skiabot-test/+/432671
Reviewed-by: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index bab7e35..4c3b1fb 100644
--- a/DEPS
+++ b/DEPS
@@ -3,7 +3,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.
-  'skia_revision': 'd438815e853d68ee989c16233dc334cdc3871241',
+  'skia_revision': '40c906f58e3ed53b445675ac16844328bfdcb5a5',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.