Use a direct include of strings headers in chrome/browser/ui/a*/.

chrome/browser/ui/android/login_prompt_android.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 "chrome/browser/ui/login/login_prompt.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/android/tab_android.h"
 #include "chrome/browser/ui/android/chrome_http_auth_handler.h"
 #include "chrome/browser/ui/login/login_prompt.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/web_contents.h"
 #include "net/base/auth.h"
 
 using content::BrowserThread;
 using net::URLRequest;
@@ skipping 55 matching lines @@
 
  private:
   scoped_ptr<ChromeHttpAuthHandler> chrome_http_auth_handler_;
 };
 
 // static
 LoginHandler* LoginHandler::Create(net::AuthChallengeInfo* auth_info,
                                    net::URLRequest* request) {
   return new LoginHandlerAndroid(auth_info, request);
 }