Add metrics for supervised user whitelist installation and uninstallation, and absolute count.

chrome/browser/supervised_user/supervised_user_whitelist_service.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/supervised_user/supervised_user_whitelist_service.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/metrics/histogram.h"
+#include "base/metrics/user_metrics.h"
+#include "base/metrics/user_metrics_action.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/scoped_user_pref_update.h"
 #include "base/strings/string_split.h"
 #include "base/values.h"
 #include "chrome/browser/component_updater/supervised_user_whitelist_installer.h"
 #include "chrome/browser/supervised_user/supervised_user_site_list.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "sync/api/sync_change.h"
@@ skipping 32 matching lines @@
   for (base::DictionaryValue::Iterator it(*whitelists); !it.IsAtEnd();
        it.Advance()) {
     const base::DictionaryValue* dict = nullptr;
     it.value().GetAsDictionary(&dict);
     std::string name;
     bool result = dict->GetString(kName, &name);
     DCHECK(result);
     bool new_installation = false;
     RegisterWhitelist(it.key(), name, new_installation);
   }
+  UMA_HISTOGRAM_COUNTS_100("ManagedUsers.Whitelist.Count", whitelists->size());
 
   // Register whitelists specified on the command line.
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   std::string command_line_whitelists = command_line->GetSwitchValueASCII(
       switches::kInstallSupervisedUserWhitelists);
   std::vector<std::string> split_whitelists;
   base::SplitString(command_line_whitelists, ',', &split_whitelists);
   for (const std::string& whitelist : split_whitelists) {
     std::string id;
     std::string name;
@@ skipping 176 matching lines @@
 
   if (whitelists_removed)
     NotifyWhitelistsChanged();
 
   return error;
 }
 
 void SupervisedUserWhitelistService::AddNewWhitelist(
     base::DictionaryValue* pref_dict,
     const sync_pb::ManagedUserWhitelistSpecifics& whitelist) {
+  base::RecordAction(base::UserMetricsAction("ManagedUsers_Whitelist_Added"));
+
   bool new_installation = true;
   RegisterWhitelist(whitelist.id(), whitelist.name(), new_installation);
   scoped_ptr<base::DictionaryValue> dict(new base::DictionaryValue);
   SetWhitelistProperties(dict.get(), whitelist);
   pref_dict->SetWithoutPathExpansion(whitelist.id(), dict.release());
 }
 
 void SupervisedUserWhitelistService::SetWhitelistProperties(
     base::DictionaryValue* dict,
     const sync_pb::ManagedUserWhitelistSpecifics& whitelist) {
   dict->SetString(kName, whitelist.name());
 }
 
 void SupervisedUserWhitelistService::RemoveWhitelist(
     base::DictionaryValue* pref_dict,
     const std::string& id) {
+  base::RecordAction(base::UserMetricsAction("ManagedUsers_Whitelist_Removed"));
+
   pref_dict->RemoveWithoutPathExpansion(id, NULL);
   installer_->UnregisterWhitelist(id);
   UnloadWhitelist(id);
 }
 
 void SupervisedUserWhitelistService::RegisterWhitelist(const std::string& id,
                                                        const std::string& name,
                                                        bool new_installation) {
   bool result = registered_whitelists_.insert(id).second;
   DCHECK(result);
@@ skipping 43 matching lines @@
   UMA_HISTOGRAM_TIMES("ManagedUsers.Whitelist.TotalLoadDuration",
                       base::TimeTicks::Now() - start_time);
 
   // If the whitelist has been unregistered in the mean time, ignore it.
   if (registered_whitelists_.count(id) == 0u)
     return;
 
   loaded_whitelists_[id] = whitelist;
   NotifyWhitelistsChanged();
 }