Revert of Replace EncodeBitmap with an interface.

Revert of Replace EncodeBitmap with an interface. (patchset #12 id:210001 of https://codereview.chromium.org/784643002/)

Reason for revert:
Failing serialization tasks in DM:

http://build.chromium.org/p/client.skia/builders/Test-Win8-ShuttleA-GTX660-x86-Debug/builds/352/steps/dm/logs/stdio

Original issue's description:
> Replace EncodeBitmap with an interface.
> 
> Gives more flexibility to the caller to decide whether to use the
> encoded data returned by refEncodedData().
> 
> Provides an implementation that supports the old version of
> SkPicture::serialize().
> 
> TODO: Update Chrome, so we can remove SK_LEGACY_ENCODE_BITMAP entirely
> 
> BUG=skia:3190
> 
> Committed: https://skia.googlesource.com/skia/+/0c4aba6edb9900c597359dfa49d3ce4a41bc5dd1
> 
> Committed: https://skia.googlesource.com/skia/+/02b217f80b01a7dda8493422e5257c36a9ce8464

TBR=reed@google.com,rmistry@google.com
NOTREECHECKS=true
NOTRY=true
BUG=skia:3190
Committed: https://skia.googlesource.com/skia/+/303044579913eacc177d4b28a674121725c565bb

[scroggo, 2014-12-09 16:26:48]

Created Revert of Replace EncodeBitmap with an interface.

[commit-bot: I haz the power, 2014-12-09 16:27:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/783393004/1

[commit-bot: I haz the power, 2014-12-09 16:27:40]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/303044579913eacc177d4b28a674121725c565bb