Roll third_party/shaderc/ caa519ca5..f4025c1cd (2 commits)

https://chromium.googlesource.com/external/github.com/google/shaderc/+log/caa519ca532a..f4025c1cd5c2

$ git log caa519ca5..f4025c1cd --date=short --no-merges --format='%ad %ae %s'
2020-07-01 xinghua.cao Add interface for enabling 16-bit types (#1091)
2020-06-23 rharrison Roll 5 dependencies and update tests/expectations (#1087)

Created with:
   roll-dep third_party/shaderc --roll-to 'origin/main'

Bug: dawn:426
Change-Id: I99198704f7cb3ce6e5ceab74f2941372fd4af025
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/24220
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
diff --git a/DEPS b/DEPS
index 1be6083..81b8fd0 100644
--- a/DEPS
+++ b/DEPS
@@ -79,7 +79,7 @@
     'condition': 'dawn_standalone',
   },
   'third_party/shaderc': {
-    'url': '{chromium_git}/external/github.com/google/shaderc@caa519ca532a6a3a0279509fce2ceb791c4f4651',
+    'url': '{chromium_git}/external/github.com/google/shaderc@f4025c1cd5c2146595d2c04d85de1f1b296431e7',
     'condition': 'dawn_standalone',
   },