Use RenderText vertical centering on Label and CanvasSkia text.

Use RenderText vertical centering on Label and CanvasSkia text.

Just use RenderText's cap-height vertical centering.
Do not use one-off naive font-height vertical centering.

BUG=411908
TEST=views::Label and gfx::Canvas::DrawString* text baselines look good and match Textfields.
R=sky@chromium.org

Committed: https://crrev.com/6060457aff422c0202da9fa0ed1f6243394a5fb1
Cr-Commit-Position: refs/heads/master@{#296008}

[msw, 2014-09-19 21:57:50]

msw@chromium.org changed reviewers:
+ sky@chromium.org

[msw, 2014-09-19 22:01:25]

Hey Scott, please take a look; thanks!

[sky, 2014-09-22 15:51:51]

LGTM

[msw, 2014-09-22 17:14:30]

The CQ bit was checked by msw@chromium.org

[commit-bot: I haz the power, 2014-09-22 17:15:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/585053002/40001

[commit-bot: I haz the power, 2014-09-22 17:46:06]

Committed patchset #3 (id:40001) as d4e64dc8db9c9c303f18fa2d62961e57d006c2d5

[commit-bot: I haz the power, 2014-09-22 17:46:49]

Patchset 3 (id:??) landed as
https://crrev.com/6060457aff422c0202da9fa0ed1f6243394a5fb1
Cr-Commit-Position: refs/heads/master@{#296008}