Revert of Sketch splitting SkPicture into an interface and SkBigPicture.

Revert of Sketch splitting SkPicture into an interface and SkBigPicture. (patchset #22 id:420001 of https://codereview.chromium.org/1112523006/)

Reason for revert:
speculative revert to fix failures in DEPS roll

Original issue's description:
> Sketch splitting SkPicture into an interface and SkBigPicture.
> 
> Adds small pictures for drawRect(), drawTextBlob(), and drawPath().
> These cover about 89% of draw calls from Blink SKPs,
> and about 25% of draw calls from our GMs.
> 
> SkPicture handles:
>   - serialization and deserialization
>   - unique IDs
> 
> Everything else is left to the subclasses:
>   - playback(), cullRect()
>   - hasBitmap(), hasText(), suitableForGPU(), etc.
>   - LayerInfo / AccelData if applicable.
> 
> The time to record a 1-op picture improves a good chunk
> (2 mallocs to 1), and the time to record a 0-op picture 
> greatly improves (2 mallocs to none):
> 
>     picture_overhead_draw:   450ns -> 350ns
>     picture_overhead_nodraw: 300ns -> 90ns
> 
> BUG=skia:
> 
> Committed: https://skia.googlesource.com/skia/+/c92c129ff85b05a714bd1bf921c02d5e14651f8b

TBR=reed@google.com,robertphillips@google.com,mtklein@google.com,mtklein@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Committed: https://skia.googlesource.com/skia/+/b7ed856fadae52401d3bbcac22cfc3391780ace8

[reed2, 2015-05-08 00:29:33]

Created Revert of Sketch splitting SkPicture into an interface and SkBigPicture.

[commit-bot: I haz the power, 2015-05-08 00:29:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1130333002/1

[commit-bot: I haz the power, 2015-05-08 00:30:18]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/b7ed856fadae52401d3bbcac22cfc3391780ace8

[reed2, 2015-05-08 00:31:12]

@@@STEP_LOG_LINE@RecordingSourceTest_1.NoDiscardablePixelRefs@RecordingSource...
(run #1):@@@
@@@STEP_LOG_LINE@RecordingSourceTest_1.NoDiscardablePixelRefs@[ RUN      ]
RecordingSourceTest/1.NoDiscardablePixelRefs@@@
@@@STEP_LOG_LINE@RecordingSourceTest_1.NoDiscardablePixelRefs@[3223:3223:0507/165908:3541814002:INFO:SkMiniRecorder.cpp(53)]
../../third_party/skia/src/core/SkMiniRecorder.cpp:53: failed assertion
"false"@@@
@@@STEP_LOG_LINE@RecordingSourceTest_1.NoDiscardablePixelRefs@@@@
@@@STEP_LOG_LINE@RecordingSourceTest_1.NoDiscardablePixelRefs@[3223:3223:0507/165908:3541814140:FATAL:SkMiniRecorder.cpp(53)]
SK_CRASH@@@