Roll src/third_party/skia 5155d38fdcd4..ef21d7e47963 (7 commits)

https://skia.googlesource.com/skia.git/+log/5155d38fdcd4..ef21d7e47963


git log 5155d38fdcd4..ef21d7e47963 --date=short --no-merges --format='%ad %ae %s'
2018-07-02 timliang@google.com implement onreadpixels for metal gpu backend
2018-07-02 senorblanco@chromium.org GrTessellator: handle three consecutive collinear edges.
2018-07-02 timliang@google.com implemented wrapped backend texture/rendertarget/textureRT for Metal gpu backend
2018-07-02 halcanary@google.com Simplify GrGLInterface::abandon
2018-07-02 skcms-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com Roll skia/third_party/skcms 0977edc92270..9d19e2abf000 (4 commits)
2018-07-02 brianosman@google.com Remove sRGB config checks based on color space
2018-07-02 skcms-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com Roll skia/third_party/skcms 99b01c076f47..0977edc92270 (1 commits)


Created with:
  gclient setdep -r src/third_party/skia@ef21d7e47963

The AutoRoll server is located here: https://autoroll.skia.org

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

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.

CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel

BUG=chromium:851409
TBR=ethannicholas@chromium.org

Change-Id: Ib1d63293fa9961e041a34f0bad7b4f031e34689c
Reviewed-on: https://chromium-review.googlesource.com/1123279Reviewed-by: skia-chromium-autoroll <skia-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: skia-chromium-autoroll <skia-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#572050}

DEPS

@@ -105,7 +105,7 @@ vars = {
   # 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': '5155d38fdcd4d4e94181bf01ef4831e442a4380b',
+  'skia_revision': 'ef21d7e47963c716895684f9f397e7cbcdb845ab',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.