WIP Fix resize issues (Part I)

After a few false starts trying to fix LIP.autoResize(),
I noticed that it has become obsolete by our latest
improvements (bucketing and cashing), so I decided to
get rid of it and let the browser do the resizing.
I tested in Chrome/Safari/FF and this approach seems
to work fine.

Still work in progress and there are many things that should
be cleaned up regarding the image object logic but please take
a look and let me know if you have any objections if I go
this route.

Bug: 56454
Change-Id: I08207d0f1fcc9dcb69ec31c03e96cfd0c0a6c522
Mingle: 239
Merge "WIP Fix resize issues (Part I)"