Roll chromium_revision 4df2d47..6018759 (361029:361030)

Change log: https://chromium.googlesource.com/chromium/src/+log/4df2d47..6018759
Full diff: https://chromium.googlesource.com/chromium/src/+/4df2d47..6018759

No dependencies changed.
No update to Clang.

TBR=
CQ_EXTRA_TRYBOTS=tryserver.webrtc:win_baremetal,mac_baremetal,linux_baremetal

Review URL: https://codereview.webrtc.org/1469683002

Cr-Commit-Position: refs/heads/master@{#10739}
diff --git a/DEPS b/DEPS
index eb74500..1124a65 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': '4df2d47c986e15641bcea90198558ec88ca7c2dc',
+  'chromium_revision': '6018759ce49b745a4a33d033815010e5aecf6987',
 }
 
 # NOTE: Prefer revision numbers to tags for svn deps. Use http rather than