Roll chromium_revision 49c85e01a1..47684d7e23 (440284:440330)

Change log: https://chromium.googlesource.com/chromium/src/+log/49c85e01a1..47684d7e23
Full diff: https://chromium.googlesource.com/chromium/src/+/49c85e01a1..47684d7e23

Changed dependencies:
* src/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult.git/+log/5bec04aa94..489a5bc40e
DEPS diff: https://chromium.googlesource.com/chromium/src/+/49c85e01a1..47684d7e23/DEPS

No update to Clang.

TBR=
BUG=None

Review-Url: https://codereview.webrtc.org/2599653002
Cr-Commit-Position: refs/heads/master@{#15748}
diff --git a/DEPS b/DEPS
index 72835c7..b71fab4 100644
--- a/DEPS
+++ b/DEPS
@@ -5,7 +5,7 @@
 
 vars = {
   'chromium_git': 'https://chromium.googlesource.com',
-  'chromium_revision': '49c85e01a1cb4c9da1ce92d5792c87738eb26b70',
+  'chromium_revision': '47684d7e2323e73654f8f88090a399a4705dfc00',
 }
 
 deps = {