operator overloads for Sk4x, use them all where possible

operator overloads for Sk4x, use them all where possible

BUG=skia:
NOTRY=true

Committed: https://skia.googlesource.com/skia/+/26bf90e5d63024585a8261b224ea4387079e2751

[mtklein_C, 2015-03-19 21:57:02]

mtklein@chromium.org changed reviewers:
+ caryclark@google.com, reed@google.com

[mtklein_C, 2015-03-19 21:57:50]

The CQ bit was checked by mtklein@chromium.org

[commit-bot: I haz the power, 2015-03-19 21:58:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1024633003/1

[commit-bot: I haz the power, 2015-03-19 21:58:01]

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 2015-03-20 03:58 UTC

[commit-bot: I haz the power, 2015-03-19 22:01:42]

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

[commit-bot: I haz the power, 2015-03-19 22:01:42]

Try jobs failed on following builders:
  Build-Win-VS2013-x86-Debug-Trybot on client.skia.compile (JOB_FAILED,
http://build.chromium.org/p/client.skia.compile/builders/Build-Win-VS2013-x86...)
  Build-Win-VS2013-x86_64-Debug-Trybot on client.skia.compile (JOB_FAILED,
http://build.chromium.org/p/client.skia.compile/builders/Build-Win-VS2013-x86...)

[mtklein, 2015-03-19 22:07:31]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2015-03-19 22:07:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1024633003/20001

[commit-bot: I haz the power, 2015-03-19 22:07:44]

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 2015-03-20 04:07 UTC

[commit-bot: I haz the power, 2015-03-20 04:07:56]

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

[commit-bot: I haz the power, 2015-03-20 04:07:57]

No LGTM from a valid reviewer yet. Please ask for an LGTM from a
full Skia committer from
https://skia.googlesource.com/skia/+/master/CQ_COMMITTERS

[caryclark, 2015-03-20 11:36:39]

lgtm

[mtklein, 2015-03-20 11:40:09]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2015-03-20 11:40:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1024633003/20001

[rmistry, 2015-03-20 12:29:04]

The CQ bit was unchecked by rmistry@google.com

[rmistry, 2015-03-20 12:32:13]

On 2015/03/20 11:40:28, I haz the power (commit-bot) wrote:
> CQ is trying da patch. Follow status at
>  https://chromium-cq-status.appspot.com/patch-status/1024633003/20001

We had a problem with trybots batching builds, Eric has fixed this. I will put
this CL back in the queue.

[rmistry, 2015-03-20 12:32:19]

The CQ bit was checked by rmistry@google.com

[commit-bot: I haz the power, 2015-03-20 12:32:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1024633003/20001

[rmistry, 2015-03-20 12:33:41]

On 2015/03/20 12:32:31, I haz the power (commit-bot) wrote:
> CQ is trying da patch. Follow status at
>  https://chromium-cq-status.appspot.com/patch-status/1024633003/20001

Ah doesnt look like the master is picking this up because it thinks it already
passed the windows trybots. Adding NOTRY.

[rmistry, 2015-03-20 12:34:01]

The CQ bit was unchecked by rmistry@google.com

[rmistry, 2015-03-20 12:34:21]

The CQ bit was checked by rmistry@google.com

[commit-bot: I haz the power, 2015-03-20 12:34:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1024633003/20001

[mtklein, 2015-03-20 12:35:15]

On 2015/03/20 12:33:41, rmistry wrote:
> On 2015/03/20 12:32:31, I haz the power (commit-bot) wrote:
> > CQ is trying da patch. Follow status at
> >  https://chromium-cq-status.appspot.com/patch-status/1024633003/20001
> 
> Ah doesnt look like the master is picking this up because it thinks it already
> passed the windows trybots. Adding NOTRY.

Thanks Ravi!

[commit-bot: I haz the power, 2015-03-20 13:01:05]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/26bf90e5d63024585a8261b224ea4387079e2751