Fix LCD text handling for SVG filters.

Turn off LCD (subpixel AA) text while recording the DisplayList used
for image filters, since we don't know about the opacity of the
destination playback canvas (and using the recording canvas's
opacity is wrong).

BUG=422176

Review URL: https://codereview.chromium.org/645993002

git-svn-id: svn://svn.chromium.org/blink/trunk@183558 bbb929c8-8fbe-4397-9dbb-9b2b20218538