Rename existing nonpreserving reallocs to reset, add reset to SkAutoMalloc, use reset in GrBufferAllocPool

Review URL: http://codereview.appspot.com/4951058/


git-svn-id: http://skia.googlecode.com/svn/trunk@2215 2bbb7eff-a529-9590-31e7-b0007b416f81
9 files changed