UMA Metrics for the user menu, including vasquette-detection

chrome/browser/profiles/profile_metrics.h

Index: chrome/browser/profiles/profile_metrics.h
diff --git a/chrome/browser/profiles/profile_metrics.h b/chrome/browser/profiles/profile_metrics.h
index 174c203c239affe270a5e0092e43b6a61ca85ab5..38bb0648a7782f8d01fa53bc4272667ae1ec1394 100644
--- a/chrome/browser/profiles/profile_metrics.h
+++ b/chrome/browser/profiles/profile_metrics.h
@@ -96,6 +96,37 @@ class ProfileMetrics {
     NUM_PROFILE_ENROLLMENT_METRICS,
   };
 
+  // Enum for tracking user interactions with the user menu and user manager,
+  // including tracking if the vasquette was the start for user interaction.
+  // Note: The n items before |FIRST_VASQUETTE_SIGNOUT_ENUM| should parallel
+  // the n items between |FIRST_VASQUETTE_SIGNOUT_ENUM| and
+  // |NUM_PROFILE_DESKTOP_SIGNOUT_METRICS| to indicate whether the particular
+  // user action was initiated from the vasquette or the avatar button.
+  enum ProfileDesktopSignout {
+    // User opened the user menu directly, and clicked lock.
+    PROFILE_DESKTOP_MENU_LOCK,
+    // User opened the user menu directly, and switched profiles.
+    PROFILE_DESKTOP_MENU_SWITCH,
+    // User opened the user menu directly, and started removing an account.
+    PROFILE_DESKTOP_MENU_REMOVE_ACCT,
+    // User opened the user menu directly, and started adding an account.
+    PROFILE_DESKTOP_MENU_ADD_ACCT,
+    // |FIRST_VASQUETTE_SIGNOUT_ENUM| should always be the midpoint enum.
+    // This bucket of the histogram should always be empty.
+    FIRST_VASQUETTE_SIGNOUT_ENUM,
+    // User clicked on vasquette, went to the user menu, and clicked lock.
+    PROFILE_DESKTOP_VASQUETTE_MENU_LOCK,
+    // User clicked on vasquette, went to the user menu, and switched profiles.
+    PROFILE_DESKTOP_VASQUETTE_MENU_SWITCH,
+    // User clicked on vasquette, went to the user menu, and started removing an
+    // account.
+    PROFILE_DESKTOP_VASQUETTE_REMOVE_ACCT,
+    // User clicked on vasquette, went to the user menu, and started adding an
+    // account.
+    PROFILE_DESKTOP_VASQUETTE_ADD_ACCT,
+    NUM_PROFILE_DESKTOP_SIGNOUT_METRICS,
+  };
+
   static void UpdateReportedProfilesStatistics(ProfileManager* manager);
 
   static void LogNumberOfProfiles(ProfileManager* manager);
@@ -108,6 +139,8 @@ class ProfileMetrics {
   static void LogProfileSyncInfo(ProfileSync metric);
   static void LogProfileAuthResult(ProfileAuth metric);
   static void LogProfileUpgradeEnrollment(ProfileUpgradeEnrollment metric);
+  static void LogProfileDesktopSignout(ProfileDesktopSignout metric,
+                                       bool opened_from_vasquette);
 
   // These functions should only be called on the UI thread because they hook
   // into g_browser_process through a helper function.