Roll src/third_party/shaderc/src/ 909f0d3d3..ce7d92182 (28 commits)

https://chromium.googlesource.com/external/github.com/google/shaderc.git/+log/909f0d3d31e7..ce7d92182b8c

$ git log 909f0d3d3..ce7d92182 --date=short --no-merges --format='%ad %ae %s'
2019-01-22 fjhenigman Use the full spirv-cross dependency. (#550)
2019-01-22 corentin BUILD.gn: fix build error on is_component_build=true (#549)
2019-01-21 corentin BUILD.gn: Make libraries Chromium-style "components" (#548)
2019-01-17 fjhenigman Disable spvc build by default.  (#542) (#547)
2019-01-16 fjhenigman Fix build with exceptions off. (#546)
2019-01-16 dneto Fix MinGW: Format %lu must be unsigned long. (#544)
2019-01-16 dneto Fix leaks in tests (#545)
2019-01-15 fjhenigman Fix ASAN build. (#543)
2019-01-15 fjhenigman Add libshaderc_spvc interface to SPIRV-Cross. (#524)
2019-01-15 fjhenigman Fix NDK build. (#540)
2019-01-11 dneto Android.mk: better fallback for SPIRV-Tools dir (#538)
2019-01-09 dj2 Roll RE2 Dep (#537)
2019-01-07 dj2 Fixup source matching test (#534)
2019-01-03 fjhenigman Fix Windows test script return value. (#533)
2019-01-02 dj2 Switch GLSLang to upstream (#515)
2018-12-28 alex Generate source text debug info if requested (#455) (#532)
2018-12-27 ehsann [kokoro] Stop running tests on VS 2013 builds. (#531)
2018-12-21 fjhenigman Update Android NDK. (#530)
2018-12-17 dneto Test shader uniforms need descriptor set and binding (#523)
2018-12-17 kknb1056 Add git clone of re2 and effcee to the Dockerfile (#527)
2018-11-28 dj2 Update to use Android.mk from glslang (#520)
2018-11-22 dneto Add unit tests for mesh and task shaders
2018-11-21 arseny.kapoulkine Add support for NV_EXTENSIONS in #pragma shader_stage()
2018-11-19 dj2 Build file updates. (#514)
2018-11-15 dj2 Fixup shadowed variables (#513)
2018-10-11 dneto Unpin googletest. It has been fixed upstream
2018-11-13 dj2 Add effcee and re2 when building spirv-tools tests (#510)
2018-10-24 dj2 Only include third_party directories if needed. (#507)

Created with:
  roll-dep src/third_party/shaderc/src

TBR=dsinclair@chromium.org
BUG=dawn:29

Change-Id: I1c6c740bfa91404e9523769924d0bdbd7b4b9b46
Reviewed-on: https://chromium-review.googlesource.com/c/1434095Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625685}

DEPS

@@ -241,7 +241,7 @@ 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.
-  'shaderc_revision': '909f0d3d31e7e7c8f39b40ba0e1dd7f99b749776',
+  'shaderc_revision': 'ce7d92182b8cc9c72e99efb5fab1eae3c2084887',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling feed
   # and whatever else without interference from each other.