Split EBreak enum into EBreakBetween & EBreakInside
This change splits EBreak into two enums that are ready for automatic
generation.
Before this change:
* The EBreak enum includes all values applicable to break-before &
break-after properties.
* A subset of these values are applicable to break-inside & this
subset is enforced with some asserts.
After this change:
* EBreakBetween includes all values applicable to break-before &
break-after.
* EBreakInside includes values applicable to break-inside.
Client code working with EBreak has been made specific to the
appropriate new enum. I burrowed upwards through the call chain using
code search to find out / verify whether each client was using EBreak to
store EBreakBetween-like values (most often), EBreakInside-like values
(sometimes), or both (rarely).
I chose the name "EBreakBetween" because the main clients in /layout use
"Between" for the same thing.
BUG=628043
Review-Url: https://codereview.chromium.org/2682573002
Cr-Commit-Position: refs/heads/master@{#449903}
11 files changed
