Instrument "Remove this person" in user manager.

chrome/browser/profiles/profile_metrics.cc

Index: chrome/browser/profiles/profile_metrics.cc
diff --git a/chrome/browser/profiles/profile_metrics.cc b/chrome/browser/profiles/profile_metrics.cc
index 6dfcf73c00b427620233ea57f637a11da634bcb7..6060db96803b84c42e09c1d123e5c9fc334fb4ac 100644
--- a/chrome/browser/profiles/profile_metrics.cc
+++ b/chrome/browser/profiles/profile_metrics.cc
@@ -329,8 +329,11 @@ void ProfileMetrics::LogProfileDeleteUser(ProfileDelete metric) {
   DCHECK(metric < NUM_DELETE_PROFILE_METRICS);
   UMA_HISTOGRAM_ENUMERATION("Profile.DeleteProfileAction", metric,
                             NUM_DELETE_PROFILE_METRICS);
-  UMA_HISTOGRAM_ENUMERATION("Profile.NetUserCount", PROFILE_DELETED,
-                            NUM_PROFILE_NET_METRICS);
+  if (metric != DELETE_PROFILE_USER_MANAGER_SHOW_WARNING) {
+    // If a user was actually deleted, update the net user count.
+    UMA_HISTOGRAM_ENUMERATION("Profile.NetUserCount", PROFILE_DELETED,
+                              NUM_PROFILE_NET_METRICS);
+  }
 }
 
 void ProfileMetrics::LogProfileOpenMethod(ProfileOpen metric) {