Use a real download item.
BUG=
14659,
17100
TEST=Download multiple things. Items should now be inserted from the left. When a download is in progress, the time to completion should be displayed, when it's done the time should fade out and the filename should move down. Download items should appear in a sweep animation. Clicking the download directly should open it; clicking the arrow on the right of the download item should show the correct context menu. If a download filename is long, it should be elided in the middle.
Committed:
http://src.chromium.org/viewvc/chrome?view=rev&revision=21201