Rolling 4 dependencies

Roll third_party/SPIRV-Tools/ 253806adc..e3da3143b (14 commits)

253806adc4..e3da3143b2

$ git log 253806adc..e3da3143b --date=short --no-merges --format='%ad %ae %s'
2019-10-17 kubak Disallow use of OpCompositeExtract/OpCompositeInsert with no indices (#2980)
2019-10-17 rharrison Add fuzzer for spirv-dis call path (#2977)
2019-10-17 rharrison Check binary->code existence before destroying (#2979)
2019-10-17 akb825 Improved CMake install step. (#2963)
2019-10-16 kubak Support constant-folding UConvert and SConvert (#2960)
2019-10-16 rharrison Add fuzzer for spirv-as call path (#2976)
2019-10-15 afdx spirv-fuzz: Refactor 'copy object' and 'construct composite' transformations (#2966)
2019-10-15 dneto Update SPIR-V binary header test for SPIR-V 1.5 (#2967)
2019-10-14 afdx spirv-fuzz: Refactor 'split blocks' to identify instructions differently (#2961)
2019-10-11 alanbaker Validate that selections are structured (#2962)
2019-10-11 afdx spirv-fuzz: Rework id descriptors (#2959)
2019-10-11 afdx spirv-fuzz: Add fuzzer pass to add NoContraction decorations (#2950)
2019-10-11 afdx spirv-fuzz: Add fuzzer pass to change function controls (#2951)
2019-10-10 paulthomson reduce: add large tests and fix (#2947)

Roll third_party/glslang/ 4b97a1108..834ee546f (23 commits)

4b97a11081..834ee546f9

$ git log 4b97a1108..834ee546f --date=short --no-merges --format='%ad %ae %s'
2019-10-17 jbolz Only apply volatile semantics to atomics when using Vulkan Memory Model
2019-10-16 dsinclair Use commandline options instead of ENV variables
2019-10-16 rharrison Keep code style improvements
2019-10-16 dsinclair Indenting
2019-10-15 dsinclair Update CMakeLists.txt
2019-10-15 dsinclair Move TARGETDIR as well
2019-10-15 dsinclair Make runtests configurable.
2019-10-15 rharrison Fix config issues and revert previous fixes for semi-colon issues
2019-10-16 swda.durl Added an option to make pch enabled in Cmake
2019-10-15 wahlster find Python and add External subdir only if BUILD_EXTERNAL option was set (on by default) and /External dir exists
2019-10-14 cepheus GLSL/SPV: Pre SPIR-V 1.5, subgroupQuadBroadcast index must be constant
2019-10-12 geothrock remove redundant check
2019-10-12 Xottab-DUTY Fixed typo in README.md
2019-10-11 rharrison Forgot that GCC doesn't recognize this flag
2019-10-11 rharrison Remove unnecessary semi-colons and add warning about them
2019-10-10 cepheus Fix #1924: Promote SPV_EXT_physical_storage_buffer to KHR when required.
2019-10-10 greg Update spirv-tools known good.
2019-10-10 cepheus Fix #1924: Emit SPV_EXT_physical_storage_buffer, not the KHR form.
2019-09-04 lryer Fix code style issue and remove setXfbBufferStride new paramte
2019-09-02 lryer Adjusting code interface
2019-08-25 geothrock Add support for GL_ARB_explicit_uniform_location
2019-08-06 james.rumble Handle install vs build include directories
2019-08-06 james.rumble Export glslang targets on installation

Roll third_party/spirv-cross/ e5d3a6655..a92668bc1 (8 commits)

e5d3a6655e..a92668bc11

$ git log e5d3a6655..a92668bc1 --date=short --no-merges --format='%ad %ae %s'
2019-10-17 post Fix OpVectorExtractDynamic with spec constant op index.
2019-10-16 post Travis: Update PATH for Python3 on Windows.
2019-10-14 post MSL: Add opt-in support for huge IABs.
2019-10-14 post HLSL: Fix unrolled S/G LE/LT/GE/GT opcodes.
2019-10-14 post GLSL: Deal correctly with bitwidth on integer compares.
2019-10-14 post HLSL: Partially implement Unordered compare.
2019-10-14 post GLSL: Support unordered floating point compare.
2019-10-11 post MSL: Fix regression with OpCompositeConstruct from std140 float[].

Roll third_party/spirv-headers/ b252a5095..af64a9e82 (2 commits)

b252a50953..af64a9e826

$ git log b252a5095..af64a9e82 --date=short --no-merges --format='%ad %ae %s'
2019-10-15 cepheus Versioning: Complete the versioning change in recent commits.
2019-10-14 nicolai.haehnle buildHeaders: update version to SPIR-V 1.5

Created with:
  roll-dep third_party/SPIRV-Tools third_party/glslang third_party/shaderc third_party/spirv-cross third_party/spirv-headers

Change-Id: I0396a3e0e20e7cfc74603ef60512c2c715eb2c70
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/12440
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>

DEPS

@@ -50,21 +50,21 @@ deps = {
 
   # SPIRV-Cross
   'third_party/spirv-cross': {
-    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Cross@e5d3a6655e13870a6f38f40bd88cc662b14e3cdf',
+    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Cross@a92668bc118a7660e7e2689b74e642508a2a2737',
     'condition': 'dawn_standalone',
   },
 
   # SPIRV compiler dependencies: SPIRV-Tools, SPIRV-headers, glslang and shaderc
   'third_party/SPIRV-Tools': {
-    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Tools@253806adc4c654c087ffe1e8e64b538d00989b16',
+    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Tools@e3da3143b2fbecb0caef19c36eb73b0caf9cb543',
     'condition': 'dawn_standalone',
   },
   'third_party/spirv-headers': {
-    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Headers@b252a50953ac4375cb1864e94f4b0234db9d215d',
+    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Headers@af64a9e826bf5bb5fcd2434dd71be1e41e922563',
     'condition': 'dawn_standalone',
   },
   'third_party/glslang': {
-    'url': '{chromium_git}/external/github.com/KhronosGroup/glslang@4b97a1108114107a8082a55e9e0721a40f9536d3',
+    'url': '{chromium_git}/external/github.com/KhronosGroup/glslang@834ee546f93d33a80fb2dea6fdef6764f8730b75',
     'condition': 'dawn_standalone',
   },
   'third_party/shaderc': {