Moved nonproperties 'affectedBy*' to be generated in ComputedStyleBase.

Move the nonproperty fields:
- affectedByFocus
- affectedByHover
- affectedByActive
- affectedByDrag
to be generated in ComputedStyleBase.  Also moved getter / setter
methods to be generated in ComputedStyleBase.

BUG=628043

Review-Url: https://codereview.chromium.org/2669453002
Cr-Commit-Position: refs/heads/master@{#453935}
2 files changed