Expand header in serialized pictures
Make chunk/tag reading allow for optional and (somewhat) out-of-order chunks.
Return empty picture instead of throwing on error
Review URL: https://codereview.appspot.com/6329049

git-svn-id: http://skia.googlecode.com/svn/trunk@4308 2bbb7eff-a529-9590-31e7-b0007b416f81
3 files changed