Revert 273601 "Change directory if the active list item on navig..."

Revert 273601 "Change directory if the active list item on navig..."

This broke browser_test on Linux ChromiumOS Tests (dbg). I need to ivestigate it.

> Change directory if the active list item on navigation list is changed.
>
> We want to change current directory if the active item on navigation list is changed.
> But we don't want to change current directory when listed items are spliced or permuted.
> In both cases, 'change' event is dispatched from selection model and we can't distinguish these cases from event itself.
> currentActiveItem_ is introduced to detect change of actual active item.
>
> BUG=375663
> TEST=go through steps in Issue 375663 and 361047
>
> Review URL: https://codereview.chromium.org/303503004

TBR=yoshiki@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=273724

[fukino, 2014-05-30 05:29:16]

Committed patchset #1 manually as r273724.