Revert 66784 - Converts usage of SetProp/GetProp to a map. Even after making ...

Revert 66784 - Converts usage of SetProp/GetProp to a map. Even after making sure we
clean up props we still leak in a handful of cases that are causing
test grief. By and large our usage of properties is for inside the
application, so that a map works fine.

BUG=61528
44991

Review URL: http://codereview.chromium.org/5075003

TBR=sky@chromium.org

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=66786