Gardening. Mark http/tests/inspector/styles/selector-line-sourcemap-header-deprecated.html as flaky. Remove a test-specific expectation which should no longer be crashing.
Gardening. Mark http/tests/inspector/styles/selector-line-sourcemap-header-deprecated.html as flaky. Remove a test-specific expectation which should no longer be crashing.

TBR=kbr
BUG=247553,250920

Review URL: https://codereview.chromium.org/17288006

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@152571 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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