Cleanup StyleRareInheritedData.
This patch changes StyleRareInheritedData to make it easier to generate:
- Remove unused destructor
- Replace explicit copy constructor with RefCountedCopyable
- Replace forward declarations with #includes.
This is in preparation for generating StyleRareInheritedData. While this
patch may increase compile times, we would have to pay this cost anyway
when we generate StyleRareInheritedData in ComputedStyleBase.
BUG=628043
Review-Url: https://codereview.chromium.org/2881003002
Cr-Commit-Position: refs/heads/master@{#472234}
2 files changed
