Generate methods for SubtreeWillChangeContents in ComputedStyleBase.

This patch generates getters/setters for SubtreeWillChangeContents.

Diff of generated files:
https://gist.github.com/46ddf3dfedfbbc8a990e1c3acff6507d/revisions

Bug: 628043
Change-Id: I411be4511953bb15e9b626439179a8ea8ca1684a
Reviewed-on: https://chromium-review.googlesource.com/525214
Commit-Queue: Darren Shen <shend@chromium.org>
Reviewed-by: Naina Raisinghani <nainar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#477437}
2 files changed