[Password Manager] Add UMA stats for custom passphrase users.

components/password_manager/core/browser/password_manager.cc

Index: components/password_manager/core/browser/password_manager.cc
diff --git a/components/password_manager/core/browser/password_manager.cc b/components/password_manager/core/browser/password_manager.cc
index aa5744e18b28bbd180072f8f6e54e81f47647f72..ec7991cc19b45463e04efde10b96ea925d9db3b2 100644
--- a/components/password_manager/core/browser/password_manager.cc
+++ b/components/password_manager/core/browser/password_manager.cc
@@ -41,7 +41,8 @@ typedef autofill::SavePasswordProgressLogger Logger;
 // that this is only ever called from a single thread in order to
 // avoid needing to lock (a static boolean flag is then sufficient to
 // guarantee running only once).
-void ReportMetrics(bool password_manager_enabled) {
+void ReportMetrics(bool password_manager_enabled,
+                   PasswordManagerClient* client) {
   static base::PlatformThreadId initial_thread_id =
       base::PlatformThread::CurrentId();
   DCHECK(initial_thread_id == base::PlatformThread::CurrentId());
@@ -51,6 +52,8 @@ void ReportMetrics(bool password_manager_enabled) {
     return;
   ran_once = true;
 
+  PasswordStore* store = client->GetPasswordStore();
+  store->ReportMetrics(client);
   UMA_HISTOGRAM_BOOLEAN("PasswordManager.Enabled", password_manager_enabled);
 }
 
@@ -112,7 +115,7 @@ PasswordManager::PasswordManager(PasswordManagerClient* client)
   saving_passwords_enabled_.Init(prefs::kPasswordManagerSavingEnabled,
                                  client_->GetPrefs());
 
-  ReportMetrics(*saving_passwords_enabled_);
+  ReportMetrics(*saving_passwords_enabled_, client_);
 }
 
 PasswordManager::~PasswordManager() {