udate unittests to test refdict's destructor git-svn-id: http://skia.googlecode.com/svn/trunk@731 2bbb7eff-a529-9590-31e7-b0007b416f81
-- experimental git-svn-id: http://skia.googlecode.com/svn/trunk@730 2bbb7eff-a529-9590-31e7-b0007b416f81