Move policy code into components/policy.

components/policy/core/common/cloud/enterprise_metrics.h

Index: components/policy/core/common/cloud/enterprise_metrics.h
diff --git a/chrome/browser/policy/cloud/enterprise_metrics.h b/components/policy/core/common/cloud/enterprise_metrics.h
similarity index 93%
rename from chrome/browser/policy/cloud/enterprise_metrics.h
rename to components/policy/core/common/cloud/enterprise_metrics.h
index 1b0c9206bb1fb2b390356cbbbeb6df144b8f7b6e..c7c5e8af056033219303d4f2d7483642178ab96e 100644
--- a/chrome/browser/policy/cloud/enterprise_metrics.h
+++ b/components/policy/core/common/cloud/enterprise_metrics.h
@@ -2,8 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_BROWSER_POLICY_CLOUD_ENTERPRISE_METRICS_H_
-#define CHROME_BROWSER_POLICY_CLOUD_ENTERPRISE_METRICS_H_
+#ifndef COMPONENTS_POLICY_CORE_COMMON_CLOUD_ENTERPRISE_METRICS_H_
+#define COMPONENTS_POLICY_CORE_COMMON_CLOUD_ENTERPRISE_METRICS_H_
+
+#include "components/policy/policy_export.h"
 
 namespace policy {
 
@@ -189,12 +191,12 @@ enum MetricPolicyRefresh {
 // Names for the UMA counters. They are shared from here since the events
 // from the same enum above can be triggered in different files, and must use
 // the same UMA histogram name.
-extern const char kMetricToken[];
-extern const char kMetricPolicy[];
-extern const char kMetricEnrollment[];
-extern const char kMetricPolicyRefresh[];
-extern const char kMetricPolicyInvalidations[];
+POLICY_EXPORT extern const char kMetricToken[];
+POLICY_EXPORT extern const char kMetricPolicy[];
+POLICY_EXPORT extern const char kMetricEnrollment[];
+POLICY_EXPORT extern const char kMetricPolicyRefresh[];
+POLICY_EXPORT extern const char kMetricPolicyInvalidations[];
 
 }  // namespace policy
 
-#endif  // CHROME_BROWSER_POLICY_CLOUD_ENTERPRISE_METRICS_H_
+#endif  // COMPONENTS_POLICY_CORE_COMMON_CLOUD_ENTERPRISE_METRICS_H_