[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"

[blundell, 2014/05/19 11:04:32]

I believe that the target generating the headers from the protos needs to be
distinct from the target in which this file is built so that the target in which
this file is built can depend on it and thus ensure that the headers are present
at build time.

[Ilya Sherman, 2014/05/19 11:16:27]

Done.

 
 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_