Fix TranslateTransformOperation::dependsOnBoxSize for calc values

This patch fixes TranslateTransformOperation to say it depends on the
box size when it has a calculated component. Note that we don't check
the z component since this is always just a Fixed Length.

TBR=steveblock
BUG=328889

Review URL: https://codereview.chromium.org/106033005

git-svn-id: svn://svn.chromium.org/blink/trunk@164048 bbb929c8-8fbe-4397-9dbb-9b2b20218538