Roll Clang to dec27d72.

AKA roll Clang 332838:335864.

https://chromium.googlesource.com/chromium/src/tools/clang/+log/c893c7ee..dec27d72

TBR=dsinclair@chromium.org

Change-Id: I41b4cb633b5aa82d2fd9e1e5a7d6b313bba88917
Reviewed-on: https://pdfium-review.googlesource.com/36831
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index 8664fe8..c462302 100644
--- a/DEPS
+++ b/DEPS
@@ -18,7 +18,7 @@
   'build_revision': '10a93c2ce7360864b59aecfed4c6b8608cd2f0cc',
   'buildtools_revision': '893eb86b02b2571894e328f05551112b96df1cce',
   'catapult_revision': '8fbdf9f10b76595b6299e577709f2608ae29e19a',
-  'clang_revision': 'c893c7eec4706f8c7fc244ee254b1dadd8f8d158',
+  'clang_revision': 'dec27d726d78471325a143a49863846e91d39df8',
   'code_coverage_revision': '14b8501b7d9f41826d632254a1df8bc664edeec7',
   'cygwin_revision': 'c89e446b273697fadf3a10ff1007a97c0b7de6df',
   'depot_tools_revision': '869a2857a4f3acc08fdec6182ecec5b73593be3b',