[Metrics] Move CachingPermutedEntropyProvider into the variations component.

components/variations/caching_permuted_entropy_provider.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_COMMON_METRICS_CACHING_PERMUTED_ENTROPY_PROVIDER_H_
-#define CHROME_COMMON_METRICS_CACHING_PERMUTED_ENTROPY_PROVIDER_H_
+#ifndef COMPONENTS_VARIATIONS_CACHING_PERMUTED_ENTROPY_PROVIDER_H_
+#define COMPONENTS_VARIATIONS_CACHING_PERMUTED_ENTROPY_PROVIDER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/threading/thread_checker.h"
-#include "chrome/common/metrics/proto/permuted_entropy_cache.pb.h"
 #include "components/variations/entropy_provider.h"
+#include "components/variations/proto/permuted_entropy_cache.pb.h"
 
 class PrefService;
 class PrefRegistrySimple;
 
 namespace metrics {
 
 // CachingPermutedEntropyProvider is an entropy provider that uses the same
 // algorithm as the PermutedEntropyProvider, but caches the results in Local
 // State between runs.
 class CachingPermutedEntropyProvider : public PermutedEntropyProvider {
@@ skipping 32 matching lines @@
 
   base::ThreadChecker thread_checker_;
   PrefService* local_state_;
   mutable PermutedEntropyCache cache_;
 
   DISALLOW_COPY_AND_ASSIGN(CachingPermutedEntropyProvider);
 };
 
 }  // namespace metrics
 
-#endif  // CHROME_COMMON_METRICS_CACHING_PERMUTED_ENTROPY_PROVIDER_H_
+#endif  // COMPONENTS_VARIATIONS_CACHING_PERMUTED_ENTROPY_PROVIDER_H_