Use constrained values for shouldDisableDesktopWorkarounds.
shouldDisableDesktopWorkarounds() used parsed ViewportArguments instead of the
constrained values, which meant auto and percentage sized @viewport would not
be considered as documents adapted to small screens.
This fix uses the constrained values from PageScaleConstraints instead.
A test for using auto-sizing of @viewport was added.
BUG=280759
Review URL: https://chromiumcodereview.appspot.com/23592015
git-svn-id: svn://svn.chromium.org/blink/trunk@157173 bbb929c8-8fbe-4397-9dbb-9b2b20218538
3 files changed
