update test for devtools inspector backend

DevTools CL that changes the expectation:
https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/1934208

Bug: chromium:1025667
Change-Id: I8fa0339ff2c8d743741001c6b75b713fcce68f55
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1950535Reviewed-by: Mathias Bynens <mathias@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Changhao Han <changhaohan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721933}

third_party/blink/web_tests/TestExpectations

@@ -6007,7 +6007,6 @@ crbug.com/993790 external/wpt/document-policy/required-policy/required-document-
 crbug.com/993790 external/wpt/document-policy/required-policy/required-document-policy.html [ Failure ]
 
 # Temporary suppression to allow devtools-frontend changes
-crbug.com/1025667 http/tests/devtools/inspector-backend-commands.js [ Pass Failure ]
 crbug.com/1029489 http/tests/devtools/elements/elements-linkify-attributes.js [ Pass Failure ]
 crbug.com/1030258 http/tests/devtools/resource-har-conversion.js [ Pass Failure ]
 

third_party/blink/web_tests/http/tests/devtools/inspector-backend-commands-expected.txt

 Tests correctness of promisified protocol commands.
 
 error: Request Profiler.commandError failed. {"message":"this is the error message"}
-commandError: then result: null
+commandError: catch result: {"message":"this is the error message"}
 commandArgs0: then result: undefined
 error: Protocol Error: Extra 1 arguments in a call to method 'Profiler.commandArgs0'.
 commandArgs0: then result: null