Tabs tests: Don't call start directly from setTimeout because Firefox <13 is dumb.

Author: scottgonzalez

tests/unit/tabs/tabs_core.js

@@ -269,7 +269,11 @@ asyncTest( "keyboard support - LEFT, RIGHT, UP, DOWN, HOME, END, SPACE, ENTER",
 		equal( panels.eq( 2 ).attr( "aria-expanded" ), "false", "third panel has aria-expanded=false" );
 		equal( panels.eq( 2 ).attr( "aria-hidden" ), "true", "third panel has aria-hidden=true" );
 
-		setTimeout( start, 1 );
+		// support: Firefox 12
+		// Firefox <13 passes arguments so we can't use setTimeout( start, 1 )
+		setTimeout(function() {
+			start();
+		}, 1 );
 	}
 
 	setTimeout( step1, 1 );
@@ -462,7 +466,11 @@ asyncTest( "keyboard support - CTRL navigation", function() {
 		equal( panels.eq( 0 ).attr( "aria-expanded" ), "false", "first panel has aria-expanded=false" );
 		equal( panels.eq( 0 ).attr( "aria-hidden" ), "true", "first panel has aria-hidden=true" );
 
-		setTimeout( start, 1 );
+		// support: Firefox 12
+		// Firefox <13 passes arguments so we can't use setTimeout( start, 1 )
+		setTimeout(function() {
+			start();
+		}, 1 );
 	}
 
 	setTimeout( step1, 1 );
@@ -554,7 +562,11 @@ asyncTest( "keyboard support - CTRL+UP, ALT+PAGE_DOWN, ALT+PAGE_UP", function()
 		panels.eq( 1 ).simulate( "keydown", { keyCode: keyCode.UP, ctrlKey: true } );
 		strictEqual( document.activeElement, tabs[ 1 ], "second tab is activeElement" );
 
-		setTimeout( start, 1 );
+		// support: Firefox 12
+		// Firefox <13 passes arguments so we can't use setTimeout( start, 1 )
+		setTimeout(function() {
+			start();
+		}, 1 );
 	}
 
 	setTimeout( step1, 1 );