Roll chromium_revision 21934f358a..fcbfda57b7 (388405:388458)

Change log: https://chromium.googlesource.com/chromium/src/+log/21934f358a..fcbfda57b7
Full diff: https://chromium.googlesource.com/chromium/src/+/21934f358a..fcbfda57b7

No dependencies changed.
No update to Clang.

TBR=

Review URL: https://codereview.webrtc.org/1903593003

Cr-Commit-Position: refs/heads/master@{#12440}
diff --git a/DEPS b/DEPS
index 3ed9fb2..43c3a86 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': '21934f358a96ef3596d739d62b85520b6242ff65',
+  'chromium_revision': 'fcbfda57b74a524deb20aa9a2124ce75470eb39f',
 }
 
 # NOTE: Use http rather than https; the latter can cause problems for users