Roll chromium_revision d5098d0..a12e1e1 (326014:326495)

Relevant changes:
* src/third_party/libvpx: 0816cf2..c600ca7
* src/tools/swarming_client: 13e7c88..f222001
Details: https://chromium.googlesource.com/chromium/src/+/d5098d0..a12e1e1/DEPS

Clang version was not updated in this roll.

TBR=pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/49149004

Cr-Commit-Position: refs/heads/master@{#9077}
1 file changed