simplify clip inside a layer -- will be applied in restore

simplify clip inside a layer -- will be applied in restore

BUG=skia:
TBR=
NOTREECHECKS=True

speculative land to measure performance

Committed: https://skia.googlesource.com/skia/+/c275493d4247a2c5ae845d340c4297258f4684bc

[reed2, 2015-03-11 01:15:46]

The CQ bit was checked by reed@chromium.org

[commit-bot: I haz the power, 2015-03-11 01:16:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/997763002/1

[commit-bot: I haz the power, 2015-03-11 01:16:07]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from valid reviewer(s) till 2015-03-11 07:16 UTC

[reed2, 2015-03-11 02:51:46]

The CQ bit was checked by reed@chromium.org

[commit-bot: I haz the power, 2015-03-11 02:51:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/997763002/20001

[commit-bot: I haz the power, 2015-03-11 02:57:14]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/c275493d4247a2c5ae845d340c4297258f4684bc

[reed2, 2015-03-11 11:02:02]

A revert of this CL (patchset #2 id:20001) has been created in
https://codereview.chromium.org/997103002/ by reed@chromium.org.

The reason for reverting is: slight rebaselines needed in layouttests

http://build.chromium.org/p/tryserver.blink/builders/linux_blink_rel/builds/5....