Implement cloud policy invalidations using the invalidation service framework.

chrome/browser/policy/cloud/enterprise_metrics.cc

Index: chrome/browser/policy/cloud/enterprise_metrics.cc
diff --git a/chrome/browser/policy/cloud/enterprise_metrics.cc b/chrome/browser/policy/cloud/enterprise_metrics.cc
index e2bbb0e63fc735646fa979489d95cdcfc0841829..b9d4eda7d0c543236651188962eda392e9b513fc 100644
--- a/chrome/browser/policy/cloud/enterprise_metrics.cc
+++ b/chrome/browser/policy/cloud/enterprise_metrics.cc
@@ -6,8 +6,10 @@
 
 namespace policy {
 
-const char* kMetricToken = "Enterprise.DMToken";
-const char* kMetricPolicy = "Enterprise.Policy";
-const char* kMetricEnrollment = "Enterprise.Enrollment";
+const char kMetricToken[] = "Enterprise.DMToken";
+const char kMetricPolicy[] = "Enterprise.Policy";
+const char kMetricEnrollment[] = "Enterprise.Enrollment";
+const char kMetricPolicyRefresh[] = "Enterprise.PolicyRefresh";
+const char kMetricPolicyInvalidations[] = "Enterprise.PolicyInvalidations";
 
 }  // namespace policy