Revert of Port uses of SkLazyPtr to SkOncePtr.

Revert of Port uses of SkLazyPtr to SkOncePtr. (patchset #7 id:110001 of https://codereview.chromium.org/1322933005/ )

Reason for revert:
Breaks Chrome roll.

obj/skia/ext/skia_chrome.skia_memory_dump_provider.o
does not have -I include/private on its include path, but transitively includes SkMessageBus.h.

Original issue's description:
> Port uses of SkLazyPtr to SkOncePtr.
> 
> This gives SkOncePtr a non-trivial destructor that uses std::default_delete
> by default.  This is overrideable, as seen in SkColorTable.
> 
> SK_DECLARE_STATIC_ONCE_PTR still just leaves its pointers hanging at EOP.
> 
> BUG=skia:
> 
> No public API changes.
> TBR=reed@google.com
> 
> Committed: https://skia.googlesource.com/skia/+/a1254acdb344174e761f5061c820559dab64a74c

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

Committed: https://skia.googlesource.com/skia/+/2ac6793efc9b33f6104f9c39810bee5714bdc208

[mtklein, 2015-09-09 14:10:30]

Created Revert of Port uses of SkLazyPtr to SkOncePtr.

[commit-bot: I haz the power, 2015-09-09 14:10:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1334523002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1334523002/1

[commit-bot: I haz the power, 2015-09-09 14:10:45]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/2ac6793efc9b33f6104f9c39810bee5714bdc208