Bump devtools to 53b9620798ff824f016add0fa6c25e9cc399ea0b

Change-Id: I9af3a41dffd5969d82a6c0cb102ea1e24a1271bd
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/434101
Reviewed-by: Kenzie Davisson <[email protected]>
Commit-Queue: Samuel Rawlins <[email protected]>

Author: srawlins

DEPS

@@ -100,7 +100,7 @@ vars = {
   "boringssl_rev": "035e720641f385e82c72b7b0a9e1d89e58cb5ed5",
   "browser-compat-data_tag": "ac8cae697014da1ff7124fba33b0b4245cc6cd1b", # v1.0.22
   "cpu_features_rev": "936b9ab5515dead115606559502e3864958f7f6e",
-  "devtools_rev": "c65f3f2e353750614b66c664d4dd451853d1035e",
+  "devtools_rev": "53b9620798ff824f016add0fa6c25e9cc399ea0b",
   "icu_rev": "43953f57b037778a1b8005564afabe214834f7bd",
   "jinja2_rev": "2222b31554f03e62600cd7e383376a7c187967a1",
   "libcxx_rev": "bd557f6f764d1e40b62528a13b124ce740624f8f",