Replace string16 with base::string16.

chrome/browser/custom_handlers/protocol_handler_registry_browsertest.cc

 // Copyright (c) 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 <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
@@ skipping 51 matching lines @@
     params.writing_direction_right_to_left = 0;
 #endif  // OS_MACOSX
     TestRenderViewContextMenu* menu = new TestRenderViewContextMenu(
         browser()->tab_strip_model()->GetActiveWebContents(), params);
     menu->Init();
     return menu;
   }
 
   void AddProtocolHandler(const std::string& protocol,
                           const GURL& url,
-                          const string16& title) {
+                          const base::string16& title) {
     ProtocolHandler handler = ProtocolHandler::CreateProtocolHandler(
           protocol, url, title);
     ProtocolHandlerRegistry* registry =
         ProtocolHandlerRegistryFactory::GetForProfile(browser()->profile());
     // Fake that this registration is happening on profile startup. Otherwise
     // it'll try to register with the OS, which causes DCHECKs on Windows when
     // running as admin on Windows 7.
     registry->is_loading_ = true;
     registry->OnAcceptRegisterProtocolHandler(handler);
     registry->is_loading_ = false;
@@ skipping 22 matching lines @@
   ASSERT_TRUE(test_server()->Start());
   GURL handler_url = test_server()->GetURL("files/custom_handler_foo.html");
   AddProtocolHandler("foo", handler_url,
                      UTF8ToUTF16(std::string("Test foo Handler")));
 
   ui_test_utils::NavigateToURL(browser(), GURL("foo:test"));
 
   ASSERT_EQ(handler_url,
             browser()->tab_strip_model()->GetActiveWebContents()->GetURL());
 }