Revert devtools_frontend_revision to before https://crrev.com/c/2304672

Change-Id: I445c53ad6bc4c23617dfa09a8ace832df28e7519
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2308442Reviewed-by: Anders Hartvoll Ruud <andruud@chromium.org>
Commit-Queue: Fergal Daly <fergal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#790321}

DEPS

@@ -266,7 +266,7 @@ 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': '270e6f332c4179801c60551c828c07c69104e594',
+  'devtools_frontend_revision': 'e810d53b527e62eecc71811267755cbd02922555',
   # 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.