We never paint scroll corners. The only thing we need them
for is so that the vertical and horizontal scrollbars don't
overlap each other. So, that's the only place left that
still computes a scroll corner rect.
We don't support resizers. Remove the code for them as well
as the CSS resize property.
R=abarth@chromium.org
Review URL: https://codereview.chromium.org/689283003
We only use this data URL parser to pre-cache images loaded from data URLs.
It's not clear we need that optimization in this system. If we do want it, we
can just call the data URL parser directly.
R=eseidel@chromium.org
Review URL: https://codereview.chromium.org/691623003
