Revert 61899 for breaking cookes on file:// URLs....

Revert 61899 for breaking cookes on file:// URLs.
BUG=58553
=================================================
Fix instances of passing raw pointers to RefCounted objects in tasks.

Some of these manually handled it correctly by using AddRef()/Release() pairs.  I switched them to make_scoped_refptr() to be more consistent.  This also makes them cleanup properly on MessageLoop shutdown if we start deleting tasks.

BUG=28083
TEST=builds

Review URL: http://codereview.chromium.org/3581008

TBR=willchan@chromium.org

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=62043