GitLab

BUG=646323
TESTS=webkit_unit_tests DocumentLoadingRenderingTest.ShouldNotPerformRepeatedLayoutWithPendingImport DocumentLoadingRenderingTest.ShouldClearPlaceholderStyleWhenIgnoringPendingStylesheet

Review-Url: https://codereview.chromium.org/2333263002
Cr-Commit-Position: refs/heads/master@{#419067}