Revert of Port most uses of SkOnce to SkLazyPtr.

Revert of Port most uses of SkOnce to SkLazyPtr. (https://codereview.chromium.org/304383005/)

Reason for revert:
linux x86-64 release segfault in src/ports/SkFontHost_fontconfig.cpp:107

http://108.170.220.120:10117/builders/Test-Ubuntu12-ShuttleA-GTX660-x86_64-Release/builds/905/steps/RunTests/logs/stdio

Original issue's description:
> Port most uses of SkOnce to SkLazyPtr.
> 
> BUG=skia:
> 
> Committed: http://code.google.com/p/skia/source/detail?r=15006
> 
> Committed: http://code.google.com/p/skia/source/detail?r=15014

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

Committed: http://code.google.com/p/skia/source/detail?r=15015

[mtklein, 2014-05-31 00:12:19]

Created Revert of Port most uses of SkOnce to SkLazyPtr.

[commit-bot: I haz the power, 2014-05-31 00:14:56]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/mtklein@google.com/306063004/1

[commit-bot: I haz the power, 2014-05-31 00:15:28]

Change committed as 15015