Roll chromium_revision 3a3410e0eb..9e319197e5 (502042:502732)

Change log: https://chromium.googlesource.com/chromium/src/+log/3a3410e0eb..9e319197e5
Full diff: https://chromium.googlesource.com/chromium/src/+/3a3410e0eb..9e319197e5

Changed dependencies:
* src/base: https://chromium.googlesource.com/chromium/src/base/+log/b120cdc8d8..6afcd86a32
* src/build: https://chromium.googlesource.com/chromium/src/build/+log/800cde0e9e..f3edcd4990
* src/ios: https://chromium.googlesource.com/chromium/src/ios/+log/a4c7e58966..86201d6b56
* src/testing: https://chromium.googlesource.com/chromium/src/testing/+log/8ca56a609f..d7f8718a82
* src/third_party: https://chromium.googlesource.com/chromium/src/third_party/+log/5d202b9b7d..c1de82c542
* src/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult.git/+log/1a2a373481..441164c72d
* src/tools: https://chromium.googlesource.com/chromium/src/tools/+log/9069575d37..7653ce02e1
DEPS diff: https://chromium.googlesource.com/chromium/src/+/3a3410e0eb..9e319197e5/DEPS

Clang version changed 312679:313222
Details: https://chromium.googlesource.com/chromium/src/+/3a3410e0eb..9e319197e5/tools/clang/scripts/update.py

TBR=kjellander@chromium.org
BUG=libyuv:721, chromium:766322

Change-Id: I38430171fa76ade415fafe20edb2055181e12818
Reviewed-on: https://chromium-review.googlesource.com/672043
Commit-Queue: Frank Barchard <fbarchard@google.com>
Reviewed-by: Frank Barchard <fbarchard@google.com>