[CrOS] Replicate lock screen auth methods metrics on login screen

Bug: 1136092
Change-Id: Ibe736b6ad40c343c1a7b3d946328849916583a65
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2601374Reviewed-by: Denis Kuznetsov [CET] <antrim@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Thomas Tellier <tellier@google.com>
Cr-Commit-Position: refs/heads/master@{#842491}

chrome/browser/chromeos/login/login_auth_recorder.cc

@@ -136,19 +136,29 @@ LoginAuthRecorder::~LoginAuthRecorder() {
 
 void LoginAuthRecorder::RecordAuthMethod(AuthMethod method) {
   DCHECK_NE(method, AuthMethod::kNothing);
-  if (session_manager::SessionManager::Get()->session_state() !=
-      session_manager::SessionState::LOCKED) {
-    return;
+
+  bool is_locked;
+  switch (session_manager::SessionManager::Get()->session_state()) {
+    case session_manager::SessionState::LOGIN_PRIMARY:
+    case session_manager::SessionState::LOGIN_SECONDARY:
+      is_locked = false;
+      break;
+    case session_manager::SessionState::LOCKED:
+      is_locked = true;
+      break;
+    default:
+      return;
   }
+  const std::string prefix =
+      is_locked ? "Ash.Login.Lock.AuthMethod." : "Ash.Login.Login.AuthMethod.";
 
-  // Record usage of the authentication method in lock screen.
+  // Record usage of the authentication method in login/lock screen.
   const bool is_tablet_mode = ash::TabletMode::Get()->InTabletMode();
+  std::string used_metric_name;
   if (is_tablet_mode) {
-    base::UmaHistogramEnumeration("Ash.Login.Lock.AuthMethod.Used.TabletMode",
-                                  method);
+    base::UmaHistogramEnumeration(prefix + "Used.TabletMode", method);
   } else {
-    base::UmaHistogramEnumeration(
-        "Ash.Login.Lock.AuthMethod.Used.ClamShellMode", method);
+    base::UmaHistogramEnumeration(prefix + "Used.ClamShellMode", method);
   }
 
   if (last_auth_method_ != method) {
@@ -156,8 +166,7 @@ void LoginAuthRecorder::RecordAuthMethod(AuthMethod method) {
     const base::Optional<AuthMethodSwitchType> switch_type =
         FindSwitchType(last_auth_method_, method);
     if (switch_type) {
-      base::UmaHistogramEnumeration("Ash.Login.Lock.AuthMethod.Switched",
-                                    *switch_type);
+      base::UmaHistogramEnumeration(prefix + "Switched", *switch_type);
     }
 
     last_auth_method_ = method;

tools/metrics/histograms/histograms_xml/ash/histograms.xml

@@ -1035,7 +1035,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
   <owner>tellier@google.com</owner>
   <owner>cros-oac@google.com</owner>
   <summary>
-    The count of auth method switching actions in ChromeOS lock screen.
+    The count of auth method switching actions on ChromeOS lock screen.
   </summary>
 </histogram>
 
@@ -1046,7 +1046,8 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
   <owner>cros-oac@google.com</owner>
   <summary>
     The usage of different auth methods (PIN / Password / Smartlock /
-    Fingerprint / Challenge response) in ChromeOS lock screen clamshell mode.
+    Fingerprint / Challenge response) on Chromebooks in clamshell mode and on
+    other form-factors.
   </summary>
 </histogram>
 
@@ -1057,7 +1058,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
   <owner>cros-oac@google.com</owner>
   <summary>
     The usage of different auth methods (PIN / Password / Smartlock /
-    Fingerprint / Challenge response) in ChromeOS lock screen tablet mode.
+    Fingerprint / Challenge response) on Chromebooks in tablet mode.
   </summary>
 </histogram>
 
@@ -1092,6 +1093,39 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
   </summary>
 </histogram>
 
+<histogram name="Ash.Login.Login.AuthMethod.Switched"
+    enum="AuthMethodSwitchType" expires_after="2021-05-16">
+  <owner>rsorokin@chromium.org</owner>
+  <owner>tellier@google.com</owner>
+  <owner>cros-oac@google.com</owner>
+  <summary>
+    The count of auth method switching actions on ChromeOS login screen.
+  </summary>
+</histogram>
+
+<histogram name="Ash.Login.Login.AuthMethod.Used.ClamShellMode"
+    enum="AuthMethod" expires_after="2021-05-16">
+  <owner>rsorokin@chromium.org</owner>
+  <owner>tellier@google.com</owner>
+  <owner>cros-oac@google.com</owner>
+  <summary>
+    The usage of different auth methods (PIN / Password / Smartlock /
+    Fingerprint / Challenge response) on Chromebooks in clamshell mode and on
+    other form-factors.
+  </summary>
+</histogram>
+
+<histogram name="Ash.Login.Login.AuthMethod.Used.TabletMode" enum="AuthMethod"
+    expires_after="2021-05-16">
+  <owner>rsorokin@chromium.org</owner>
+  <owner>tellier@google.com</owner>
+  <owner>cros-oac@google.com</owner>
+  <summary>
+    The usage of different auth methods (PIN / Password / Smartlock /
+    Fingerprint / Challenge response) on Chromebooks in tablet mode.
+  </summary>
+</histogram>
+
 <histogram name="Ash.Login.Login.MigrationBanner" enum="BooleanShown"
     expires_after="2021-05-16">
   <owner>rsorokin@chromium.org</owner>