Use a direct include of strings headers in url/, win8/.

win8/test/open_with_dialog_controller.h

 // Copyright (c) 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.
 
 #ifndef WIN8_TEST_OPEN_WITH_DIALOG_CONTROLLER_H_
 #define WIN8_TEST_OPEN_WITH_DIALOG_CONTROLLER_H_
 
 #include <windows.h>
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/memory/weak_ptr.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 
 namespace win8 {
 
 // Asynchronously drives Windows 8's OpenWithDialog into making a given program
 // the default handler for an URL protocol.
 class OpenWithDialogController {
  public:
   // A callback that is invoked upon completion of the OpenWithDialog
   // interaction. If the HRESULT indicates success, the interaction completed
   // successfully. Otherwise, the vector of strings may contain the list of
@@ skipping 29 matching lines @@
   class Context;
 
   base::WeakPtr<Context> context_;
 
   DISALLOW_COPY_AND_ASSIGN(OpenWithDialogController);
 };
 
 }  // namespace win8
 
 #endif // WIN8_TEST_OPEN_WITH_DIALOG_CONTROLLER_H_