Roll Tint from b8a3078bbec9 to 195917c0be32 (17 revisions)

https://dawn.googlesource.com/tint.git/+log/b8a3078bbec9..195917c0be32

2020-12-08 dneto@google.com spirv-reader: Support many more float builtins
2020-12-07 dneto@google.com spirv-reader: Support NClamp, NMin, NMax
2020-12-07 bclayton@google.com ast::type: Remove Array::set_decorations
2020-12-07 bclayton@google.com ast: Remove unused Struct::set_decorations()
2020-12-07 bclayton@google.com ast: Remove Function::set_body()
2020-12-07 bclayton@google.com ast: Remove ReturnStatement set_value()
2020-12-07 bclayton@google.com ast: Remove ReturnStatement constructors that don't take a source
2020-12-07 bclayton@google.com ast: Remove Variable constructor that doesn't take a source
2020-12-07 dneto@google.com spirv-reader: simplify GLSL.std.450 tests
2020-12-07 dneto@google.com spirv-reader: list missing GLSL.std.450 instructions
2020-12-07 bclayton@google.com ast/function: Remove [set|add]_decorations()
2020-12-07 bclayton@google.com ast: Remove IfStatement::set_else_statements()
2020-12-07 dneto@google.com spirv-reader: support UClamp, SClamp
2020-12-07 dneto@google.com spirv-reader: texture level and array index are signed
2020-12-07 dsinclair@chromium.org Remove the context object.
2020-12-07 bclayton@google.com Improve error messages raised by SpvParserTest
2020-12-07 bclayton@google.com Remove more unused AST setters

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/tint-chromium-autoroll
Please CC rharrison@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/+doc/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
Bug: None
Tbr: rharrison@google.com
Change-Id: I8c203d99ba2bb08041533976f9475793c4a7b79b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2579022Reviewed-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@{#834773}

DEPS

@@ -365,7 +365,7 @@ vars = {
   'ukey2_revision': '0275885d8e6038c39b8a8ca55e75d1d4d1727f47',
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.
-  'tint_revision': 'b8a3078bbec908507ec4686d39c133dcaae8e105',
+  'tint_revision': '195917c0be32942769106bb4ae35194b23921664',
 
   # TODO(crbug.com/941824): The values below need to be kept in sync
   # between //DEPS and //buildtools/DEPS, so if you're updating one,