Roll src/third_party/SPIRV-Tools/src cf011f990163..cf7834623053 (5 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git/+log/cf011f990163..cf7834623053


git log cf011f990163..cf7834623053 --date=short --no-merges --format='%ad %ae %s'
2019-01-29 dneto@google.com Add source/opt/block_merge_util.* to BUILD.gn (#2344)
2019-01-28 dneto@google.com Validate NonWritable decoration (#2263)
2019-01-28 stevenperron@google.com Remove code sinking for -O. (#2340)
2019-01-25 afdx@google.com Fixed names in ifdefs and GetName functions that had been forgotten in a previous refactoring.  Also shortened names of test files as those files test both the new 'finder' classes introduced in the refactoring, as well as the 'reduction pass' class; the shorter names capture both. (#2336)
2019-01-25 afdx@google.com Extracted block merging functionality into its own utility file (#2325)


Created with:
  gclient setdep -r src/third_party/SPIRV-Tools/src@cf7834623053

The AutoRoll server is located here: https://autoroll.skia.org/r/spirv-tools-chromium-autoroll

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.


TBR=dsinclair@chromium.org

Change-Id: Ia282523e4707742174f998252862f4d2967ddb56
Reviewed-on: https://chromium-review.googlesource.com/c/1443091Reviewed-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@{#627023}

DEPS

@@ -229,7 +229,7 @@ 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.
-  'spv_tools_revision': 'cf011f990163ebb3c61252dea149cd9e1799bdf2',
+  'spv_tools_revision': 'cf7834623053717435111b4ebebaed9e6848cf41',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.