[Metrics] Move CachingPermutedEntropyProvider into the variations component.

components/variations/caching_permuted_entropy_provider.h

Index: components/variations/caching_permuted_entropy_provider.h
diff --git a/chrome/common/metrics/caching_permuted_entropy_provider.h b/components/variations/caching_permuted_entropy_provider.h
similarity index 89%
rename from chrome/common/metrics/caching_permuted_entropy_provider.h
rename to components/variations/caching_permuted_entropy_provider.h
index 859283080809149341289e6ebf33ac70c6e4b98f..cb3de6d1738477c61fb2a3c144c0452378735fe8 100644
--- a/chrome/common/metrics/caching_permuted_entropy_provider.h
+++ b/components/variations/caching_permuted_entropy_provider.h
@@ -2,14 +2,14 @@
 // 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;
@@ -62,4 +62,4 @@ class CachingPermutedEntropyProvider : public PermutedEntropyProvider {
 
 }  // namespace metrics
 
-#endif  // CHROME_COMMON_METRICS_CACHING_PERMUTED_ENTROPY_PROVIDER_H_
+#endif  // COMPONENTS_VARIATIONS_CACHING_PERMUTED_ENTROPY_PROVIDER_H_