Adding functionality for purgin graphics resource handles
This will allow a fix to WebKit for preventing a crash when the graphics
context is destroyed before the GrContext

BUG=http://code.google.com/p/chromium/issues/detail?id=85309



git-svn-id: http://skia.googlecode.com/svn/trunk@1551 2bbb7eff-a529-9590-31e7-b0007b416f81
5 files changed