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

chrome/browser/importer/external_process_importer_client.h

 // 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.
 
 #ifndef CHROME_BROWSER_IMPORTER_EXTERNAL_PROCESS_IMPORTER_CLIENT_H_
 #define CHROME_BROWSER_IMPORTER_EXTERNAL_PROCESS_IMPORTER_CLIENT_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "chrome/browser/history/history_types.h"
 #include "chrome/browser/importer/importer_data_types.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/utility_process_host_client.h"
 
 class ExternalProcessImporterHost;
 struct ImportedBookmarkEntry;
 struct ImportedFaviconUsage;
 class InProcessImporterBridge;
 class TemplateURL;
@@ skipping 99 matching lines @@
   // ProfileWriter.
   scoped_refptr<InProcessImporterBridge> bridge_;
 
   // True if import process has been cancelled.
   bool cancelled_;
 
   DISALLOW_COPY_AND_ASSIGN(ExternalProcessImporterClient);
 };
 
 #endif  // CHROME_BROWSER_IMPORTER_EXTERNAL_PROCESS_IMPORTER_CLIENT_H_