Move all files related to tracked preferences from c/b/prefs to c/b/prefs/tracked.

chrome/browser/prefs/tracked/pref_hash_calculator.h

 // Copyright 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 CHROME_BROWSER_PREFS_PREF_HASH_CALCULATOR_H_
-#define CHROME_BROWSER_PREFS_PREF_HASH_CALCULATOR_H_
+#ifndef CHROME_BROWSER_PREFS_TRACKED_PREF_HASH_CALCULATOR_H_
+#define CHROME_BROWSER_PREFS_TRACKED_PREF_HASH_CALCULATOR_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 
 namespace base {
 class Value;
 }  // namespace base
 
 // Calculates and validates preference value hashes.
@@ skipping 25 matching lines @@
                             const std::string& hash) const;
 
  private:
   const std::string seed_;
   const std::string device_id_;
   const std::string legacy_device_id_;
 
   DISALLOW_COPY_AND_ASSIGN(PrefHashCalculator);
 };
 
-#endif  // CHROME_BROWSER_PREFS_PREF_HASH_CALCULATOR_H_
+#endif  // CHROME_BROWSER_PREFS_TRACKED_PREF_HASH_CALCULATOR_H_