Convert string16 to base::string16 in content.

content/shell/browser/shell_login_dialog_gtk.cc

 // Copyright 2013 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 "content/shell/browser/shell_login_dialog.h"
 
 #include <gtk/gtk.h>
 
 #include "base/logging.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/resource_dispatcher_host.h"
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_view.h"
 #include "ui/base/gtk/gtk_hig_constants.h"
 
 namespace content {
 
-void ShellLoginDialog::PlatformCreateDialog(const string16& message) {
+void ShellLoginDialog::PlatformCreateDialog(const base::string16& message) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   int render_process_id;
   int render_view_id;
   if (!ResourceRequestInfo::ForRequest(request_)->GetAssociatedRenderView(
           &render_process_id,  &render_view_id)) {
     NOTREACHED();
   }
 
   WebContents* web_contents = NULL;
@@ skipping 69 matching lines @@
       UserCancelledAuth();
       break;
     default:
       NOTREACHED();
   }
 
   gtk_widget_destroy(root_);
 }
 
 }  // namespace content