Roll chromium_revision 4fdc302b62..a7afaf4f40 (384810:384820)

Change log: https://chromium.googlesource.com/chromium/src/+log/4fdc302b62..a7afaf4f40
Full diff: https://chromium.googlesource.com/chromium/src/+/4fdc302b62..a7afaf4f40

No dependencies changed.
No update to Clang.

TBR=

Review URL: https://codereview.webrtc.org/1855723002

Cr-Commit-Position: refs/heads/master@{#12207}
diff --git a/DEPS b/DEPS
index a96697b..0c239c6 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': '4fdc302b6281499d53be92dcf151c91d51362235',
+  'chromium_revision': 'a7afaf4f40dd9febabd6a0ebcfa1fdc9e1a890ea',
 }
 
 # NOTE: Use http rather than https; the latter can cause problems for users