Use a direct include of strings headers in chrome/browser/extensions/, part 4.

chrome/browser/extensions/pack_extension_job.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_EXTENSIONS_PACK_EXTENSION_JOB_H_
 #define CHROME_BROWSER_EXTENSIONS_PACK_EXTENSION_JOB_H_
 
 #include <string>
 
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "chrome/browser/extensions/extension_creator.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace extensions {
 
 // Manages packing an extension on the file thread and reporting the result
 // back to the UI.
 class PackExtensionJob : public base::RefCountedThreadSafe<PackExtensionJob> {
  public:
   // Interface for people who want to use PackExtensionJob to implement.
@@ skipping 46 matching lines @@
   bool asynchronous_;
   int run_flags_;  // Bitset of ExtensionCreator::RunFlags values - we always
                    // assume kRequireModernManifestVersion, though.
 
   DISALLOW_COPY_AND_ASSIGN(PackExtensionJob);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_PACK_EXTENSION_JOB_H_