Roll src/third_party/dawn 6da1770507ec..1fdcb16b6995 (4 commits)

https://dawn.googlesource.com/dawn.git/+log/6da1770507ec..1fdcb16b6995

git log 6da1770507ec..1fdcb16b6995 --date=short --no-merges --format='%ad %ae %s'
2019-10-24 cwallez@chromium.org Make dawn_wire use the webgpu.h header
2019-10-24 cwallez@chromium.org Vulkan: Implement initial version of the suballocation
2019-10-24 cwallez@chromium.org Preliminary changes to Vulkan memory suballocation
2019-10-24 cwallez@chromium.org Vulkan: Use the ResourceMemoryAllocator for all resources

Created with:
  gclient setdep -r src/third_party/dawn@1fdcb16b6995

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dawn-chromium-autoroll
Please CC cwallez@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/+/master/autoroll/README.md

CQ_INCLUDE_TRYBOTS=luci.chromium.try:dawn-linux-x64-deps-rel;luci.chromium.try:dawn-mac-x64-deps-rel;luci.chromium.try:dawn-win10-x64-deps-rel;luci.chromium.try:dawn-win10-x86-deps-rel
TBR=cwallez@google.com

Bug: None
Change-Id: If9cb48571562c569436a2a2658f9fa8bb6e26f90
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1879584Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#709320}

DEPS

@@ -310,7 +310,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.
-  'dawn_revision': '6da1770507ec5695b2c3383ab7a8d7ac4b7d9a3c',
+  'dawn_revision': '1fdcb16b6995c54c645f17566d019ebf46229fd0',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.