Revert "Switch ChromeAppFileDAO to use aMapToObj."
Revert "Switch ChromeAppFileDAO to use aMapToObj."

This reverts commit 6473bccc6b9b4708d406a1fd9c7209073196fac0.

mdittmer/foam,osric-the-knight/foam,mdittmer/foam,jlhughes/foam,mdittmer/foam,foam-framework/foam,foam-framework/foam,jlhughes/foam,foam-framework/foam,jacksonic/foam,jacksonic/foam,jacksonic/foam,osric-the-knight/foam,mdittmer/foam,osric-the-knight/foam,jacksonic/foam,jlhughes/foam,jlhughes/foam,foam-framework/foam,osric-the-knight/foam,foam-framework/foam