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

chrome/browser/prefs/tracked/mock_validation_delegate.cc

 // Copyright 2014 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/prefs/mock_validation_delegate.h"
+#include "chrome/browser/prefs/tracked/mock_validation_delegate.h"
 
 MockValidationDelegate::MockValidationDelegate() {
 }
 
 MockValidationDelegate::~MockValidationDelegate() {
 }
 
 size_t MockValidationDelegate::CountValidationsOfState(
     PrefHashStoreTransaction::ValueState value_state) const {
   size_t count = 0;
@@ skipping 37 matching lines @@
 }
 
 void MockValidationDelegate::RecordValidation(
     const std::string& pref_path,
     PrefHashStoreTransaction::ValueState value_state,
     TrackedPreferenceHelper::ResetAction reset_action,
     PrefHashFilter::PrefTrackingStrategy strategy) {
   validations_.push_back(
       ValidationEvent(pref_path, value_state, reset_action, strategy));
 }