Update GN.

Bug: None
Change-Id: I4086f6f150f95567f6d38ed5e05ce755dfd10a75
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/84461
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Auto-Submit: Corentin Wallez <cwallez@chromium.org>
diff --git a/DEPS b/DEPS
index 5ce1547..6f30f12 100644
--- a/DEPS
+++ b/DEPS
@@ -16,7 +16,7 @@
   'dawn_node': False, # Also fetches dependencies required for building NodeJS bindings.
   'dawn_cmake_version': 'version:3.13.5',
   'dawn_cmake_win32_sha1': 'b106d66bcdc8a71ea2cdf5446091327bfdb1bcd7',
-  'dawn_gn_version': 'git_revision:fc295f3ac7ca4fe7acc6cb5fb052d22909ef3a8f',
+  'dawn_gn_version': 'git_revision:bd99dbf98cbdefe18a4128189665c5761263bcfb',
   'dawn_go_version': 'version:1.16',
 
   # GN variable required by //testing that will be output in the gclient_args.gni