Set CG clip to empty explicitly

Set CG clip to empty explicitly

Skia draws Mac user elements by creating a CoreGraphics context
that mirrors Skia's SkCanvas' context.

CoreGraphics does not consider a newly created path to be empty.
Explicitly set it to empty so the subsequent drawing is clipped out.

BUG: 111642
TEST: http://jsfiddle.net/kenjibaheux/UN3Dt/3/

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=119962

[Stephen White, 2012-01-31 19:44:45]

lgtm

https://chromiumcodereview.appspot.com/9104010/diff/1/skia/ext/skia_utils_mac.mm
File skia/ext/skia_utils_mac.mm (right):

https://chromiumcodereview.appspot.com/9104010/diff/1/skia/ext/skia_utils_mac...
skia/ext/skia_utils_mac.mm:338: /* CoreGraphics does not consider a newly
created path to be empty.
Nit:  the rest of this file uses // for multiline comments.

[_cary, 2012-01-31 19:49:40]

Fixed nit.
On 2012/01/31 19:44:45, Stephen White wrote:
> lgtm
> 
>
https://chromiumcodereview.appspot.com/9104010/diff/1/skia/ext/skia_utils_mac.mm
> File skia/ext/skia_utils_mac.mm (right):
> 
>
https://chromiumcodereview.appspot.com/9104010/diff/1/skia/ext/skia_utils_mac...
> skia/ext/skia_utils_mac.mm:338: /* CoreGraphics does not consider a newly
> created path to be empty.
> Nit:  the rest of this file uses // for multiline comments.

[commit-bot: I haz the power, 2012-01-31 19:51:30]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/caryclark@chromium.org/9104010/4001

[commit-bot: I haz the power, 2012-01-31 21:37:08]

Change committed as 119962