Update third_party/devtools-frontend b186cfaa74..910988b619

https://chromium.googlesource.com/devtools/devtools-frontend/+log/b186cfaa74..910988b619

TBR=bmeurer@chromium.org

Change-Id: Id0732c2609248441793fcae31e514988b661cc82
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1878688Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#709035}

DEPS

@@ -246,7 +246,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling devtools-frontend
   # and whatever else without interference from each other.
-  'devtools_frontend_revision': 'b186cfaa74d083da7655fd0394df547d69fa5b56',
+  'devtools_frontend_revision': '910988b619ba25e56cf803a411d3c2b52560ec37',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libprotobuf-mutator
   # and whatever else without interference from each other.