Improve tab-closability of right-most tab.

Improve tab-closability of right-most tab.

BUG=21903
TEST=Open 20 tabs. Put mouse over close button of some tab in the middle and keep clicking to close tabs. When the tab below the mouse is right-most, closing it should cause the other tabs to grow so that another close box ends up below the cursor (until the remaining tabs have reached the maximum tab width).

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=26354

[Nico, 2009-09-16 05:48:05]

As discussed on IRC today.

[pink (ping after 24hrs), 2009-09-16 14:37:16]

LGTM with comment.

http://codereview.chromium.org/196137/diff/1/2
File chrome/browser/cocoa/tab_strip_controller.mm (right):

http://codereview.chromium.org/196137/diff/1/2#newcode291
Line 291: if (static_cast<size_t>(index) != [tabArray_ count] - 1) {
i'd reverse the if/else cases here. check for the rightmost tab in the if, and
the else can be the normal case.