Adding sanity checks on restore offsets in SkPicturePlayback::draw

Review URL: http://codereview.appspot.com/6382044/
BUG=http://code.google.com/p/chromium/issues/detail?id=133432



git-svn-id: http://skia.googlecode.com/svn/trunk@4496 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed