Update DevTools DEPS (reviewed)

This roll requires a manual review. See http://go/reviewed-rolls for guidance.

Rolling third_party/inspector_protocol: https://chromium.googlesource.com/deps/inspector_protocol/+log/a9a8758..f43f751

Roll created at https://cr-buildbucket.appspot.com/build/8731237985417238113

[email protected]

Bug: none
Change-Id: I76cf37dad0f2ad7c9ab13e277c96cb4c2543da5c
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6021968
Reviewed-by: Alex Rudenko <[email protected]>
Commit-Queue: Alex Rudenko <[email protected]>
Reviewed-by: Simon Zünd <[email protected]>

Author: devtools-ci-autoroll-builder

DEPS

@@ -21,7 +21,7 @@ vars = {
   'depot_tools_revision': 'c22f4dc74fed3850bfa9f0775f0d026419bab980',
 
   'inspector_protocol_url': 'https://chromium.googlesource.com/deps/inspector_protocol',
-  'inspector_protocol_revision': 'a9a8758436c92515e0789e1c0ca5406b3fb87038',
+  'inspector_protocol_revision': 'f43f7515bcf291ed7413ba70b0c8514f842f9f5d',
 
   # Keeping track of the last time we rollerd the browser protocol files.
   'chromium_browser_protocol_revision' : 'affc133e5a5412e462e08273b449ea838952e216',