Disallow tabsToLinks setting to prevent tabbing to anchor with tabIndex.

LayoutTests/fast/events/frame-tab-focus.html

Index: LayoutTests/fast/events/frame-tab-focus.html
diff --git a/LayoutTests/fast/events/frame-tab-focus.html b/LayoutTests/fast/events/frame-tab-focus.html
index 477f07a6a334ee8ac0b24a6b515a6acb0a6e331b..e832c21fcb93e505e87cac0f45b4168ba4ea3761 100644
--- a/LayoutTests/fast/events/frame-tab-focus.html
+++ b/LayoutTests/fast/events/frame-tab-focus.html
@@ -17,7 +17,6 @@ function log(msg)
 function windowFocused(win, name)
 {
     return function() {
-        win.document.body.style.background = "green";
         log(name + ': window focused');
     }
 }
@@ -124,6 +123,7 @@ function test()
     log('\nOption-tabbing backward...\n');
     for (var i = 0; i < 12; ++i) {
         dispatchTabPress(document, true, true);
+        dispatchTabPress(document, true, false);
     }
 
     lastFocusedElement.blur();