Remove applyStatefulResource interface from SVGClipPainter

Remove applyStatefulResource interface from SVGClipPainter

applyClippingToContext is equally "stateful", so the two entrypoints
does not seem warranted.
Fold applyClippingToContext into applyStatefulResource and then rename
it to prepareEffect (to match mask and filter). Similarly rename
postApplyStatefulResource to finishEffect.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201262

[fs, 2015-08-26 18:24:35]

fs@opera.com changed reviewers:
+ fmalita@chromium.org, pdr@chromium.org

[fs, 2015-08-26 18:24:35]

Trybot unhappiness unrelated, but hopefully the minor behavior change in here
won't cause to much issues.

[f(malita), 2015-08-26 18:48:03]

LGTM!

[pdr., 2015-08-26 20:41:11]

LGTM

[pdr., 2015-08-26 20:41:13]

The CQ bit was checked by pdr@chromium.org

[commit-bot: I haz the power, 2015-08-26 20:41:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1308223003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1308223003/1

[commit-bot: I haz the power, 2015-08-26 23:53:04]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=201262