Open in new foreground tab is currently linked to "Cmd-Shift-Return".  Is that good enough, or do you also want 
Option-Return (Option and alt are the same key).

Please add alt-return.

http://codereview.chromium.org/218032/show

To keep things consistent, this will also make Option+LeftClick open in new foreground tab as well.  Does the 
Shift modifier keep its meaning here (does Option-Shift-Return open in new background tab)?

Does this need to go through Ben/Glen/Cole?

Do not make option-click open in a New Foreground Tab!  This should _only_ have an 
effect on the omnibox.  You should _not_ change the generic disposition oracle function 
(which should return SAVE_TO_DISK for alt-click).

I know it's inconsistent.  That isn't the point.  This matches years of other browsers' 
behavior.

The following revision refers to this bug:
    http://src.chromium.org/viewvc/chrome?view=rev&revision=27127 

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r27127 | rohitrao@chromium.org | 2009-09-24 14:45:17 -0700 (Thu, 24 Sep 2009) | 7 lines
Changed paths:
   M http://src.chromium.org/viewvc/chrome/trunk/src/chrome/browser/autocomplete/autocomplete_edit_view_mac.mm?r1=27127&r2=27126

[Mac] Support option-return to open in new foreground tab.

BUG=http://crbug.com/22882
TEST=Type something into the omnibox.  Option-return should open it in a new foreground tab.
TEST=After using Option-return to open something in a new foreground tab, switch back to the original tab and verify that the url in the omnibox has reverted to the original page's url.
TEST=Option-leftclick on a link in a webpage should still prompt you to "save as."
Review URL: http://codereview.chromium.org/218032
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4.0.219.4 (Developer Build 27365)