Force invalidation of LayoutText when text data changes

Force invalidation of LayoutText when text data changes

Previously we missed paint invalidation when text data changes without
layout change.

About test expectation rebaselines:
- Most of changes are changing incremental invalidations of LayoutTexts to
  full invalidations;
- Some are additional invalidations of LayoutTexts, but they do no harm
  because they are covered by original bigger invalidations.

BUG=493684
TEST=compositing/repaint/composited-inline-change-text-data-keep-geometry.html

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196531

[Xianzhu, 2015-06-04 19:51:10]

wangxianzhu@chromium.org changed reviewers:
+ chrishtr@chromium.org, esprehn@chromium.org

[chrishtr, 2015-06-04 19:53:41]

The CQ bit was checked by chrishtr@chromium.org

[chrishtr, 2015-06-04 19:53:41]

lgtm

[commit-bot: I haz the power, 2015-06-04 19:54:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1149083009/10004

[commit-bot: I haz the power, 2015-06-04 21:29:08]

Committed patchset #2 (id:10004) as
https://src.chromium.org/viewvc/blink?view=rev&revision=196531