Add an AlignedFreeDeleter and remove scoped_ptr_malloc.

- Transition scoped_ptr_mallocs to scoped_ptr.
- AlignedFreeDeleter matches Chromium's version.

TESTED=try bots
R=turaj@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/8969005

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5587 4adac7df-926f-26a2-2b94-8c16560cd09d
7 files changed