Roll chromium_revision 4828a631a7..bfec2ff09d (404813:404886)

Change log: https://chromium.googlesource.com/chromium/src/+log/4828a631a7..bfec2ff09d
Full diff: https://chromium.googlesource.com/chromium/src/+/4828a631a7..bfec2ff09d

No dependencies changed.
No update to Clang.

TBR=

Review-Url: https://codereview.webrtc.org/2148683002
Cr-Commit-Position: refs/heads/master@{#13453}
diff --git a/DEPS b/DEPS
index 16f9823..dde1505 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': '4828a631a7c8914d3c175c63c78fbdcee75da9b0',
+  'chromium_revision': 'bfec2ff09dfb320ca7786402a804571a4baae37b',
 }
 
 # NOTE: Use http rather than https; the latter can cause problems for users