Fix bug where a shelf or infobar would not be closed correctly when closing a...

Fix bug where a shelf or infobar would not be closed correctly when closing a tab. 

The issue was because ShelfVisibilityChangedImpl is called twice, once with a null current_tab for the closing tab (via TabClosingAt), and once on selection of the new tab (via TabSelectedAt) - the first call nulls the shelves without doing a Layout, the nulled shelves then don't show up in the second call, so Layout is never called.

http://crbug.com/2069

BUG=2069
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=3528

[sky, 2008-10-14 23:22:54]

LGTM once you add the initialize for needs_layout_.

http://codereview.chromium.org/7155/diff/1/4
File chrome/browser/views/old_frames/vista_frame.h (right):

http://codereview.chromium.org/7155/diff/1/4#newcode385
Line 385: bool needs_layout_;
Don't forget to set this in the member initializer (or Init).