Remove failure expectations from http/tests/inspector/extensions-useragent.html
Remove failure expectations from http/tests/inspector/extensions-useragent.html

TBR=alph@chromium.org

BUG=522651

Review URL: https://codereview.chromium.org/1536093002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#366189}

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