Only (and always) put URLs in NSLinkAttributeName.

chrome/browser/ui/cocoa/infobars/alternate_nav_infobar_controller.mm

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/infobars/alternate_nav_infobar_controller.h"
 
 #include "base/logging.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/browser/ui/cocoa/infobars/infobar_cocoa.h"
 #include "chrome/browser/ui/omnibox/alternate_nav_infobar_delegate.h"
@@ skipping 20 matching lines @@
   base::string16 message = delegate->GetMessageTextWithOffset(&offset);
   base::string16 link = delegate->GetLinkText();
   message.insert(offset, link);
   NSFont* font = [NSFont labelFontOfSize:
                   [NSFont systemFontSizeForControlSize:NSRegularControlSize]];
   HyperlinkTextView* view = (HyperlinkTextView*)label_.get();
   [view setMessage:base::SysUTF16ToNSString(message)
           withFont:font
       messageColor:[NSColor blackColor]];
   [view addLinkRange:NSMakeRange(offset, link.length())
-            withName:@""
+             withURL:base::SysUTF8ToNSString(delegate->GetLinkURL().spec())
            linkColor:[NSColor blueColor]];
 }
 
 // Called when someone clicks on the link in the infobar.  This method
 // is called by the InfobarTextField on its delegate (the
 // AlternateNavInfoBarController).
 - (void)linkClicked {
   if (![self isOwned])
     return;
   WindowOpenDisposition disposition =
       ui::WindowOpenDispositionFromNSEvent([NSApp currentEvent]);
   AlternateNavInfoBarDelegate* delegate =
       static_cast<AlternateNavInfoBarDelegate*>([self delegate]);
   if (delegate->LinkClicked(disposition))
     [self removeSelf];
 }
 
 @end
 
 // static
 scoped_ptr<infobars::InfoBar> AlternateNavInfoBarDelegate::CreateInfoBar(
     scoped_ptr<AlternateNavInfoBarDelegate> delegate) {
   scoped_ptr<InfoBarCocoa> infobar(new InfoBarCocoa(delegate.Pass()));
   base::scoped_nsobject<AlternateNavInfoBarController> controller(
       [[AlternateNavInfoBarController alloc] initWithInfoBar:infobar.get()]);
   infobar->set_controller(controller);
   return infobar.Pass();
 }