cocoa/infobars: Convert the last wstring to string16.

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

 // Copyright (c) 2011 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 <Cocoa/Cocoa.h>
 
 #include "base/logging.h"  // for NOTREACHED()
 #include "base/mac/bundle_locations.h"
 #include "base/mac/mac_util.h"
 #include "base/sys_string_conversions.h"
@@ skipping 276 matching lines @@
 // NSLink attribute on the hyperlink portion of the message.  Infobars
 // use a custom NSTextField subclass, which allows us to override
 // textView:clickedOnLink:atIndex: and intercept clicks.
 //
 - (void)addAdditionalControls {
   // No buttons.
   [self removeButtons];
 
   LinkInfoBarDelegate* delegate = delegate_->AsLinkInfoBarDelegate();
   DCHECK(delegate);
-  size_t offset = std::wstring::npos;
+  size_t offset = string16::npos;
   string16 message = delegate->GetMessageTextWithOffset(&offset);
   string16 link = delegate->GetLinkText();
   NSFont* font = [NSFont labelFontOfSize:
                   [NSFont systemFontSizeForControlSize:NSRegularControlSize]];
   HyperlinkTextView* view = (HyperlinkTextView*)label_.get();
   [view setMessageAndLink:base::SysUTF16ToNSString(message)
                  withLink:base::SysUTF16ToNSString(link)
                  atOffset:offset
                      font:font
              messageColor:[NSColor blackColor]
@@ skipping 149 matching lines @@
   LinkInfoBarController* controller =
       [[LinkInfoBarController alloc] initWithDelegate:this owner:owner];
   return new InfoBar(controller, this);
 }
 
 InfoBar* ConfirmInfoBarDelegate::CreateInfoBar(InfoBarTabHelper* owner) {
   ConfirmInfoBarController* controller =
       [[ConfirmInfoBarController alloc] initWithDelegate:this owner:owner];
   return new InfoBar(controller, this);
 }