Roll src/third_party/skia/ f6f7cf609..90f28ec3d (3 commits)

https://skia.googlesource.com/skia.git/+log/f6f7cf60985d..90f28ec3da53

$ git log f6f7cf609..90f28ec3d --date=short --no-merges --format='%ad %ae %s'
2017-09-25 egdaniel Add some asserts and explict setting of fIsMipMapped
2017-09-25 benjaminwagner Specify more specific CPU dimensions.
2017-09-26 reed Revert "Revert "migrate to sk_sp for SkFontMgr API""

Created with:
  roll-dep src/third_party/skia


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

If the roll is causing failures, see:
http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium#TOC-Failures-due-to-DEPS-rolls


CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
TBR=jvanverth@chromium.org

Change-Id: I6b3cb56ecbfa52b476a14ee5e4d42c556c8e0d0a
Reviewed-on: https://chromium-review.googlesource.com/684955Reviewed-by: Skia Deps Roller <skia-deps-roller@chromium.org>
Commit-Queue: Skia Deps Roller <skia-deps-roller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#504417}

DEPS

@@ -45,7 +45,7 @@ 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': 'f6f7cf60985d8e109cc136f25e2a3c3383ca05ea',
+  'skia_revision': '90f28ec3da530d1720a0a74283a44cfd9c207126',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.