Warning: Our website does not support Internet Explorer, please use Edge instead.
Remove config.h inclusion from third_party/WebKit/Source/core/html/.
This CL has no behavior changes.
BUG=570234
TBR=yutak@chromium.org
Review URL: https://codereview.chromium.org/1540863002
Cr-Commit-Position: refs/heads/master@{#366352}