Update DevTools DEPS.
Update DevTools DEPS.

Rolling build: https://chromium.googlesource.com/chromium/src/build/+log/b19514c..f29e3b6

Rolling buildtools/linux64: git_revision:281ba2c91861b10fec7407c4b6172ec3d4661243..git_revision:19bf826e6e5d05100cb3568e90e48bd3c97d4f22

Rolling third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/aae6725..e971498

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

Bug: none
Change-Id: I815994758f304d810a73563eba0edfba7c4798ea
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/3368712
Commit-Queue: Devtools Autoroller <075cca983f8f93eec1be8cf9702f03e09507e730@chops-service-accounts.iam.gserviceaccount.com>
Bot-Commit: 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