Do not use weak refs on gifs, as only one bitmap
is ever held at a time.

Change-Id: Ibdf97fa98c551109327df67aea47f672b443b0cb
TODO: make ion hold a reference to all the bitmaps?
The weak ref stuff is totally broken. Comment it out.

Change-Id: Ic19b9dfcbf92f623bfe31e8b38e66836cd9958f9
Merge branch 'master' of https://github.com/koush/ion

# By Koushik Dutta
# Via Koushik Dutta
* 'master' of https://github.com/koush/ion:
  The weak ref stuff is totally broken. Comment it out.
  Do not use weak refs on gifs, as only one bitmap is ever held at a time.