Roll chromium_revision c6dd4461f5..9cd13b2cd1 (390857:390867)

Change log: https://chromium.googlesource.com/chromium/src/+log/c6dd4461f5..9cd13b2cd1
Full diff: https://chromium.googlesource.com/chromium/src/+/c6dd4461f5..9cd13b2cd1

No dependencies changed.
No update to Clang.

TBR=

Review-Url: https://codereview.webrtc.org/1934903002
Cr-Commit-Position: refs/heads/master@{#12580}
diff --git a/DEPS b/DEPS
index a5cd62d..41eeb7a 100644
--- a/DEPS
+++ b/DEPS
@@ -6,7 +6,7 @@
 vars = {
   'extra_gyp_flag': '-Dextra_gyp_flag=0',
   'chromium_git': 'https://chromium.googlesource.com',
-  'chromium_revision': 'c6dd4461f54c7d3f4e87bc6626e4a81f4b36dba0',
+  'chromium_revision': '9cd13b2cd1f50c5660b434c40070363e28ece434',
 }
 
 # NOTE: Use http rather than https; the latter can cause problems for users