Redirect HTML resource bytes directly to parser thread (Blink side)

Chrome side: https://codereview.chromium.org/109283006

R=eseidel@chromium.org,abarth@chromium.org
BUG=277886

Review URL: https://codereview.chromium.org/100563004

git-svn-id: svn://svn.chromium.org/blink/trunk@170476 bbb929c8-8fbe-4397-9dbb-9b2b20218538