Change RenderSVGResourceClipper's ClipperContext class into an enum

Change RenderSVGResourceClipper's ClipperContext class into an enum

RenderSVGResourceClipper needs a couple bits of state to determine
whether mask or path clipping was used. (The clipper doesn't maintain
this state because it can be applied to multiple renderers.) This patch
converts the ClipperContext class into a simple enum which is now
scoped to RenderSVGResourceClipper.

No new tests as there is no change in behavior.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=181575

[pdr., 2014-09-07 04:21:41]

pdr@chromium.org changed reviewers:
+ fmalita@google.com

[fs, 2014-09-08 08:56:09]

fs@opera.com changed reviewers:
+ fs@opera.com

[fs, 2014-09-08 08:56:10]

lgtm

[pdr., 2014-09-08 17:37:05]

The CQ bit was checked by pdr@chromium.org

[commit-bot: I haz the power, 2014-09-08 17:37:59]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/pdr@chromium.org/547723003/40001

[commit-bot: I haz the power, 2014-09-08 19:38:35]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-09-08 19:38:36]

Exceeded time limit waiting for builds to trigger.

[pdr., 2014-09-08 20:30:10]

The CQ bit was checked by pdr@chromium.org

[commit-bot: I haz the power, 2014-09-08 20:30:50]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/pdr@chromium.org/547723003/40001

[commit-bot: I haz the power, 2014-09-08 20:31:25]

Committed patchset #3 (id:40001) as 181575