Update Devtools DEPS.
Update Devtools DEPS.

Rolling build: https://chromium.googlesource.com/chromium/src/build/+log/a82ba26..a7f71a7

Rolling third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/6d31ed5..6aa0bcb

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

Change-Id: I8e0a1d69c9fbc99c89249c4cc5f1a95c78865922
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/1947666
Reviewed-by: Devtools Autoroller <075cca983f8f93eec1be8cf9702f03e09507e730@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Devtools Autoroller <075cca983f8f93eec1be8cf9702f03e09507e730@chops-service-accounts.iam.gserviceaccount.com>

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