Rolling 4 dependencies

Roll third_party/SPIRV-Tools/ 1c8bda372..fd773eb50 (5 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools/+log/1c8bda3721e6..fd773eb50d62

$ git log 1c8bda372..fd773eb50 --date=short --no-merges --format='%ad %ae %s'
2020-03-26 stevenperron Start SPIRV-Tools v2020.3
2020-03-26 stevenperron Finalize SPIRV-Tools v2020.2
2020-03-26 stevenperron Update CHANGES
2020-03-25 alanbaker Fix identification of Vulkan images and buffers (#3253)
2020-03-23 alanbaker Disallow phis of images, samplers and sampled images (#3246)

Roll third_party/glslang/ 1f0fcbe5a..08c02ced7 (38 commits)

https://chromium.googlesource.com/external/github.com/KhronosGroup/glslang/+log/1f0fcbe5a30f..08c02ced798a

$ git log 1f0fcbe5a..08c02ced7 --date=short --no-merges --format='%ad %ae %s'
2020-03-30 dsinclair Remove unused variables.
2020-03-30 cepheus Fix #2163: improve comments for addProcess() and the preamble.
2020-03-30 ntfs.hard printf format
2020-03-30 ntfs.hard unused var
2020-03-30 ntfs.hard bitwise on boolean
2020-03-30 ntfs.hard opposite inner condition
2020-03-27 greg Update spirv-tools known_good to latest stable
2020-03-26 neslisah.torosdagli accelerationStructureEXT - issue #2152
2020-03-26 neslisah.torosdagli accelerationStructureEXT - issue #2152
2020-03-26 neslisah.torosdagli pass by reference updates
2020-03-26 neslisah.torosdagli pass-by-reference updates
2020-03-25 gcmn Add missing braces to if condition
2020-03-25 neslisah.torosdagli switch format update
2020-03-24 neslisah.torosdagli copyright notice changes removed from unchanged files
2020-03-24 neslisah.torosdagli copyright notice changes removed from unchanged files
2020-03-24 neslisah.torosdagli copyright notice changes removed from unchanged files
2020-03-24 neslisah.torosdagli spirv.hpp reverted to commit f368dcbb7d8af23f0cba3015d0f4dda9dc3aa66d
2020-03-24 neslisah.torosdagli .travis updated to origin, rayQueryCheck removed
2020-03-23 neslisah.torosdagli const rayFlag defs used in the test cases in stead of numerical values
2020-03-23 neslisah.torosdagli compute and fragment shader test_cases added for rayQuery
2020-03-23 neslisah.torosdagli rayQuery test cases added
2020-03-23 neslisah.torosdagli rayQueryEXT function parameter
2020-03-23 neslisah.torosdagli rayQueryEXT assignment is allowed.
2020-03-23 neslisah.torosdagli test names updated
2020-03-23 kainino update README
2020-03-23 kainino Fix build on CMake 2.8, and fix Web build
2020-03-23 neslisah.torosdagli wait time increased for the install
2020-03-23 neslisah.torosdagli rayQuery test cases disabled
2020-03-20 neslisah.torosdagli GL_EXT_ray_query glslang updates, and test cases added.
2020-03-19 neslisah.torosdagli comment update, rayQueryEXT is writable, readonly check removed.
2020-03-19 ntorosda GL_EXT_ray_query updates
2020-03-18 cepheus Fix #2132: constant matrix constructor from single non-scalar argument
2020-03-19 neslisah.torosdagli comment update, rayQueryEXT is writable, readonly check removed.
2020-03-19 ntorosda GL_EXT_ray_query updates
2020-03-18 cepheus Fix #2132: constant matrix constructor from single non-scalar argument
2020-03-19 neslisah.torosdagli comment update, rayQueryEXT is writable, readonly check removed.
2020-03-19 neslisah.torosdagli GL_EXT_ray_query updates
2020-03-19 ntorosda GL_EXT_ray_query updates

Roll third_party/shaderc/ 3d915b280..f085b9745 (4 commits)

https://chromium.googlesource.com/external/github.com/google/shaderc/+log/3d915b280266..f085b9745fc1

$ git log 3d915b280..f085b9745 --date=short --no-merges --format='%ad %ae %s'
2020-03-30 dgkoch Roll glslang dependency to SDK-candidate tag (#1024)
2020-03-30 rharrison Add support for WebGPU to shaderc (#1021)
2020-03-26 rharrison Convert compile options to require explicit environments (#1019)
2020-03-26 dgkoch Roll glslang dependency (#1018)

Roll third_party/spirv-cross/ 871c85d7f..9b3c5e12b (1 commit)

https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Cross/+log/871c85d7f0ed..9b3c5e12be12

$ git log 871c85d7f..9b3c5e12b --date=short --no-merges --format='%ad %ae %s'
2020-03-26 post Add support for forcefully zero-initialized variables.

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

Change-Id: I2ac0196e769f6602d93d9a0659901c05cbcad5e3
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/18280
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
diff --git a/DEPS b/DEPS
index ea9a36c..f596feb 100644
--- a/DEPS
+++ b/DEPS
@@ -51,13 +51,13 @@
 
   # SPIRV-Cross
   'third_party/spirv-cross': {
-    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Cross@871c85d7f0edc6b613e3959bc51d13bfbc2fe2df',
+    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Cross@9b3c5e12be12c55533f3bd3ab9cc617ec0f393d8',
     '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@1c8bda3721e6b9302f694b58c26d32eff341b126',
+    'url': '{chromium_git}/external/github.com/KhronosGroup/SPIRV-Tools@fd773eb50d628c1981338addc093df879757c2cf',
     'condition': 'dawn_standalone',
   },
   'third_party/spirv-headers': {
@@ -65,11 +65,11 @@
     'condition': 'dawn_standalone',
   },
   'third_party/glslang': {
-    'url': '{chromium_git}/external/github.com/KhronosGroup/glslang@1f0fcbe5a30fdc9632a8bff36277103fabf0797c',
+    'url': '{chromium_git}/external/github.com/KhronosGroup/glslang@08c02ced798afe357349d0e422cd474aa1eb0c79',
     'condition': 'dawn_standalone',
   },
   'third_party/shaderc': {
-    'url': '{chromium_git}/external/github.com/google/shaderc@3d915b2802667f44a359463f1f420ac33576001b',
+    'url': '{chromium_git}/external/github.com/google/shaderc@f085b9745fc1b8471f42aa2f8c54f3c73878ef07',
     'condition': 'dawn_standalone',
   },