Revert of Update testing frameworks/tests for MDB

Revert of Update testing frameworks/tests for MDB (patchset #4 id:60001 of https://codereview.chromium.org/1441533003/ )

Reason for revert:
Speculative revert for leaks based on ASAN bot (and some local valgrind testing)

Original issue's description:
> Update testing frameworks/tests for MDB
> 
> This CL:
> 
> Fixes an ordering problem w.r.t. drawTarget clean up in GrContext::abandonContext (for text test that abandons context)
> Fixes when the lastDrawTarget field is set on a RenderTarget (now in GrDrawTarget ctor) due to GrTestTarget use case
> Updates the ProgramUnitTest to use multiple drawTargets
> Adds renderTarget creation to GrTestTargets (in MDB drawTargets require them)
> 
> BUG=skia:4094
> 
> Committed: https://skia.googlesource.com/skia/+/9c8605144a0f15e3e69a4e1dcd5d3e63f339380e

TBR=joshualitt@chromium.org,joshualitt@google.com,robertphillips@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:4094
Committed: https://skia.googlesource.com/skia/+/1d5127327111e00d0e4530adae73b11ad2ee3f42

[egdaniel, 2015-11-13 21:42:32]

Created Revert of Update testing frameworks/tests for MDB

[commit-bot: I haz the power, 2015-11-13 21:42:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1450513002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1450513002/1

[commit-bot: I haz the power, 2015-11-13 21:42:59]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/1d5127327111e00d0e4530adae73b11ad2ee3f42