toolbar: Use a PaintRecorder to access the Canvas for painting.

toolbar: Use a PaintRecorder to access the Canvas for painting.

Don't use the canvas() from the PaintContext so that we can have the
PaintContext be backed by a DisplayItemList instead in the future.
Access to the Canvas should be done through a PaintRecorder.

R=pkasting
BUG=466426
Committed: https://crrev.com/f072931f978d65c159fa043bf6d2092c25b57724
Cr-Commit-Position: refs/heads/master@{#324128}

[danakj, 2015-04-07 20:55:10]

This one's very simple/mechanical.

[Peter Kasting, 2015-04-07 21:24:58]

pkasting@chromium.org changed reviewers:
+ pkasting@chromium.org

[Peter Kasting, 2015-04-07 21:24:58]

LGTM

[danakj, 2015-04-07 21:26:32]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2015-04-07 21:27:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1066133002/1

[commit-bot: I haz the power, 2015-04-07 21:51:17]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-07 21:56:36]

Patchset 1 (id:??) landed as
https://crrev.com/f072931f978d65c159fa043bf6d2092c25b57724
Cr-Commit-Position: refs/heads/master@{#324128}