Generate StyleInheritedData in ComputedStyleBase.

This patch generates the following fields as part of a group:
- horizontal-border-spacing (short)
- vertical-border-spacing (short)
- line-height (Length)
- font (Font)
- color (Color)
- VisitedLinkColor (Color)
- TextAutoSizingMultiplier (float)

All fields are generated as storage_only in this patch, but future patches
may change that.

Diff of generated files:
https://gist.github.com/darrnshn/28f4f79881e6474913f87257fed006a4/revisions

BUG=628043

Review-Url: https://codereview.chromium.org/2840503002
Cr-Commit-Position: refs/heads/master@{#472598}
5 files changed