Roll chromium_revision c16d05789b..c6405066cc (507378:507388)

Change log: https://chromium.googlesource.com/chromium/src/+log/c16d05789b..c6405066cc
Full diff: https://chromium.googlesource.com/chromium/src/+/c16d05789b..c6405066cc

Changed dependencies:
* src/ios: https://chromium.googlesource.com/chromium/src/ios/+log/537db21572..2bfd33c284
DEPS diff: https://chromium.googlesource.com/chromium/src/+/c16d05789b..c6405066cc/DEPS

No update to Clang.

TBR=buildbot@webrtc.org,
BUG=None
CQ_INCLUDE_TRYBOTS=master.internal.tryserver.corp.webrtc:linux_internal

Change-Id: I28d75a9d92ecb06cffe484be7557e7f7d99732e6
Reviewed-on: https://webrtc-review.googlesource.com/7723
Reviewed-by: WebRTC Buildbot <buildbot@webrtc.org>
Commit-Queue: WebRTC Buildbot <buildbot@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#20212}
diff --git a/DEPS b/DEPS
index 2b8aefd..1e5ab05 100644
--- a/DEPS
+++ b/DEPS
@@ -3,7 +3,7 @@
 vars = {
   'chromium_git': 'https://chromium.googlesource.com',
   'webrtc_git': 'https://webrtc.googlesource.com',
-  'chromium_revision': 'c16d05789b49b33ee7910661f9e02eac65d86280',
+  'chromium_revision': 'c6405066cc384ad8a623c2e54fcee6d7ce3aebb9',
   'boringssl_git': 'https://boringssl.googlesource.com',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling swarming_client