Roll src/third_party/skia/ ff7fa50f0..c6c5eade8 (26 commits)

https://skia.googlesource.com/skia.git/+log/ff7fa50f0c95..c6c5eade823a

$ git log ff7fa50f0..c6c5eade8 --date=short --no-merges --format='%ad %ae %s'
2018-04-11 fmalita Reland "Fix handling of MaskFilter matrices"
2018-04-11 angle-skia-autoroll Roll third_party/externals/angle2/ 785b20b7a..2dadd1d08 (11 commits)
2018-04-11 benjaminwagner Upgrade Windows Skolo bots.
2018-04-11 reed remove unused/dumb methods from SkRect
2018-04-11 reed Clean-up paints for drawImage (etc.) to enforce that we always ignore stroking and patheffects.
2018-04-11 caryclark more path is rect bugs
2018-04-11 mtklein skcms→9334796 reject non-XYZ/Lab PCS profiles
2018-04-11 liyuqian Revert "Add private fIsBadForDAA bit to SkPath"
2018-04-11 mtklein skcms→56f2a09 add sRGB profile and ApproximatelyEqualProfiles()
2018-04-11 liyuqian Add private fIsBadForDAA bit to SkPath
2018-04-11 robertphillips Add Vulkan to the DDL bots
2018-04-11 mtklein roll to particular targets
2018-04-11 benjaminwagner Switch to latest Windows Intel Skylake GPU driver.
2018-04-11 fmalita Fix SkTCopyOnFirstWrite copy semantics
2018-04-11 reed no need to tile draws that don't involve paths
2018-04-11 mtklein skcms→91a8958 Detect and canonicalize identity tables
2018-04-11 mtklein skcms→307ec0f remove a layer of nesting in skcms_Curve
2018-04-10 robertphillips Fix alpha threshold image filter GPU implementation
2018-04-10 egdaniel Remove guard around getBackendTexture/RenderTarget calls
2018-04-11 robertphillips Revert "Fix handling of MaskFilter matrices"
2018-04-10 angle-skia-autoroll Roll third_party/externals/angle2/ 0ce016c1b..785b20b7a (7 commits)
2018-04-10 fmalita Fix handling of MaskFilter matrices
2018-04-10 robertphillips Get ViaDDL working with Vulkan
2018-04-10 brianosman skcms→e753c6d disable -Wdouble-promotion
2018-04-10 egdaniel Move GrBackendRenderTarget over to new system of getting backed infos
2018-04-10 liyuqian Remove unused field fBitmapBytes

Created with:
  roll-dep src/third_party/skia
BUG=chromium:824145,chromium:821353,chromium:821353


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
TBR=borenet@chromium.org

Change-Id: I206b007db0efd69b539806f5ba806bb8d4956d6d
Reviewed-on: https://chromium-review.googlesource.com/1008972Reviewed-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@{#550059}

DEPS

@@ -82,7 +82,7 @@ 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': 'ff7fa50f0c95adaca768e0a1c17e0264d16bd8c8',
+  'skia_revision': 'c6c5eade823a399efc1671c2c7f1bc278273d2d5',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.