Add path utils, plus a test for it.
SkOSFile:
Added class SkOSPath with functions for
modifying strings representing path names.
OSPathTest.cpp:
Test of the new utilities.
factory.cpp:
Use SkPathJoin.
gmmain and gm_expectations:
Use SkOSPath::SkPathJoin instead of a local version.
skimage_main.cpp:
Use the new location of SkPathJoin and SkBasename.
R=epoger@google.com
Review URL: https://codereview.chromium.org/
15747004
git-svn-id: http://skia.googlecode.com/svn/trunk@9277
2bbb7eff-a529-9590-31e7-
b0007b416f81