Update DevTools DEPS.
Update DevTools DEPS.

Rolling build: https://chromium.googlesource.com/chromium/src/build/+log/a2a1340..6408b07

Rolling third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/1f976d6..79f916a

TBR=machenbach@chromium.org,liviurau@chromium.org

Bug: none
Change-Id: Iba709e435acca2ab5b3c74839167160b91245a86
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2683405
Reviewed-by: Devtools Autoroller <075cca983f8f93eec1be8cf9702f03e09507e730@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Devtools Autoroller <075cca983f8f93eec1be8cf9702f03e09507e730@chops-service-accounts.iam.gserviceaccount.com>

ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend,ChromeDevTools/devtools-frontend