Show a vertical scrollbar (when needed) for overflow:-webkit-paged-y.

We were already showing a horizontal scrollbar for -webkit-paged-x. For
-webkit-paged-y, on the other hand, it only worked when it was the viewport
that was paginated, but not when specified on a regular block.

The CSS parser currently deals with the overflow shorthand in such a way that
it's the overflow-y property that gets the -webkit-paged-foo value (while
overflow-x becomes auto). Digression: While one could say that's not quite
right when it comes to horizontal writing modes, handling shorthands based on
writing mode would be nasty...

Skipping 2 of the new tests for the old / current multicol implementation,
since they fail there. All tests pass in the new implementation.

BUG=460024
R=dsinclair@chromium.org,jchaffraix@chromium.org

Review URL: https://codereview.chromium.org/940913002

git-svn-id: svn://svn.chromium.org/blink/trunk@190656 bbb929c8-8fbe-4397-9dbb-9b2b20218538
18 files changed
tree: 7a81fad89a95d81579c11426ea6aed09fdf9a58a
  1. third_party/