Revert of SkScaledCodec class

Revert of SkScaledCodec class (patchset #32 id:620001 of https://codereview.chromium.org/1260673002/ )

Reason for revert:
Segfaulting:
http://build.chromium.org/p/client.skia/builders/Test-Ubuntu-GCC-GCE-CPU-AVX2-x86-Release/builds/1605/steps/dm/logs/stdio

Original issue's description:
> SkScaledCodec class
> 
> This class does scaling by using a scanlineDecoder.
> getScanlines and skipScanlines are used for y sampling,
> the swizzler is used for x sampling
> 
> this class is currently only working for png and jpeg images
> I will update other Codec types to work soon
> 
> For SkJpegCodec to implement width wise swizzling it now
> uses a swizzler. I ran performance tests on this change.
> Here are the performance test results:
> https://docs.google.com/a/google.com/spreadsheets/d/1D7-Q_GXD_dI68LZO005NNvb8Wq2Ee0wEBEPG72671yw/edit?usp=sharing 
> 
> BUG=skia:
> 
> Committed: https://skia.googlesource.com/skia/+/0944100ac89f797714eeae0cf2875e2335ff52ee

TBR=scroggo@google.com,msarett@google.com,djsollen@google.com,mtklein@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Committed: https://skia.googlesource.com/skia/+/e5aaa07c351815f023a0842820eb769c6d4b4ed3

[emmaleer, 2015-08-13 18:35:07]

Created Revert of SkScaledCodec class

[commit-bot: I haz the power, 2015-08-13 18:35:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1294593002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1294593002/1

[commit-bot: I haz the power, 2015-08-13 18:35:19]

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 2015-08-14 00:35 UTC

[scroggo, 2015-08-13 18:42:36]

lgtm

[commit-bot: I haz the power, 2015-08-13 18:44:07]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/e5aaa07c351815f023a0842820eb769c6d4b4ed3