Only (and always) put URLs in NSLinkAttributeName.

chrome/browser/ui/cocoa/infobars/confirm_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.
 
 #include "chrome/browser/ui/cocoa/infobars/confirm_infobar_controller.h"
 
 #include "base/logging.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/ui/chrome_style.h"
@@ skipping 108 matching lines @@
     linkOffset = [message length] - [link length];
   }
   NSFont* font = [NSFont labelFontOfSize:
       [NSFont systemFontSizeForControlSize:NSRegularControlSize]];
   HyperlinkTextView* view = (HyperlinkTextView*)label_.get();
   [view setMessage:message withFont:font messageColor:[NSColor blackColor]];
   if (linkLength != 0) {
     NSColor* linkColor =
         gfx::SkColorToCalibratedNSColor(chrome_style::GetLinkColor());
     [view addLinkRange:NSMakeRange(linkOffset, linkLength)
-              withName:@""
+               withURL:base::SysUTF8ToNSString(delegate->GetLinkURL().spec())
              linkColor:linkColor];
   }
 }
 
 // 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]);
   if ([self delegate]->AsConfirmInfoBarDelegate()->LinkClicked(disposition))
     [self removeSelf];
 }
 
 @end
 
 scoped_ptr<infobars::InfoBar> InfoBarService::CreateConfirmInfoBar(
     scoped_ptr<ConfirmInfoBarDelegate> delegate) {
   scoped_ptr<InfoBarCocoa> infobar(new InfoBarCocoa(delegate.Pass()));
   base::scoped_nsobject<ConfirmInfoBarController> controller(
       [[ConfirmInfoBarController alloc] initWithInfoBar:infobar.get()]);
   infobar->set_controller(controller);
   return infobar.Pass();
 }