Move texture lock/unlock functions from SkGpuDevice into SkGr as global functions, also removed inconsistent "SkGr" class.
Review URL: https://codereview.appspot.com/6420048

git-svn-id: http://skia.googlecode.com/svn/trunk@4664 2bbb7eff-a529-9590-31e7-b0007b416f81
5 files changed