First step in pulling SkPicturePlayback & SkPictureRecord out of SkPicture

First step in pulling SkPicturePlayback & SkPictureRecord out of SkPicture

This CL begins the process of making SkPicturePlayback & SkPictureRecord independent of SkPicture. It just moves the PathHeap into SkPicture to get a feel for where all this is going to lead.

Some items of note:

SkTimedPicture (debugger/QT) should wind up being just an SkPicturePlayback-derived object.

All the flattening & unflattening should migrate out of SkPicturePlayback and into SkPicture.

SkPicture::initForPlayback should eventually become something just SkPictureRecorder::endRecording calls.

SkPicture is passed into SkPicturePlayback's & SkPictureRecord's constructors. SkPicturePlayback only
holds onto a "const SkPicture*". The SkPicturePlayback:: CreateFromStream & CreateFromBuffer methods pass a non-const
SkPicture* down the call stack.

BUG=skia:2315
Committed: http://code.google.com/p/skia/source/detail?r=14341

[reed1, 2014-04-23 17:07:39]

lgtm

[robertphillips, 2014-04-23 21:21:00]

The CQ bit was checked by robertphillips@google.com

[commit-bot: I haz the power, 2014-04-23 21:21:27]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/robertphillips@google.com/249453002/2...

[commit-bot: I haz the power, 2014-04-23 22:35:48]

Change committed as 14341