Gardening: http/tests/inspector/elements/styles/selector-line-sourcemap-header-deprecated.html flaky
Gardening: http/tests/inspector/elements/styles/selector-line-sourcemap-header-deprecated.html flaky

BUG=353179
TEST=
TBR=zmo@chromium.org

Review URL: https://codereview.chromium.org/201723006

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@169367 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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