Revert of Clean up Test's resourcePath code.

Revert of Clean up Test's resourcePath code. (https://codereview.chromium.org/319473003/)

Reason for revert:
Some benchmarks are written in a way that makes this change unsafe (e.g. const char* resPath = GetResourcePath().c_str(); in SkipZeroesBench) and Valgrind and ASAN caught that.  We can try again after a more careful cleanup of GetResourcePath().

Original issue's description:
> Clean up resourcePath code.
> 
> 1) Make the implementation of SetResourcePath/GetResourcePath of GM and SkBenchmark match with the one in Test.
> 2) Make gResourcePath a static pointer to const char and move it inside the classes.
> 
> BUG=None
> TEST=make tests && out/Debug/tests
>      make gm && out/Debug/gm
>      make bench && out/Debug/bench
> R=mtklein@google.com
> 
> Committed: https://skia.googlesource.com/skia/+/52e4f413ffe2d281f9e90ff2147db08083ffcba7

TBR=tfarina@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=None

Committed: https://skia.googlesource.com/skia/+/91359bed48bc006a4319da86eb26db3b2e6d4afb

[mtklein, 2014-06-08 14:02:04]

Created Revert of Clean up Test's resourcePath code.

[commit-bot: I haz the power, 2014-06-08 14:02:41]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/mtklein@google.com/320733002/1

[commit-bot: I haz the power, 2014-06-08 14:02:51]

Change committed as 91359bed48bc006a4319da86eb26db3b2e6d4afb