Add UMA metrics for profile switching.

chrome/browser/profiles/profile_metrics.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_PROFILES_PROFILE_METRICS_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_METRICS_H_
 
 #include <stddef.h>
 #include <string>
 
@@ skipping 49 matching lines @@
     SWITCH_PROFILE_ICON,      // User switches profiles from icon menu
     SWITCH_PROFILE_MENU,      // User switches profiles from menu bar
     SWITCH_PROFILE_DOCK,      // User switches profiles from dock (Mac-only)
     OPEN_USER_MANAGER,        // User opens the User Manager
     SWITCH_PROFILE_MANAGER,   // User switches profiles from the User Manager
     SWITCH_PROFILE_UNLOCK,    // User switches to lockd profile via User Manager
     SWITCH_PROFILE_GUEST,     // User switches to guest profile
     NUM_PROFILE_OPEN_METRICS
   };
 
+  // Enum for tracking the state of profiles being switched to.
+  enum ProfileOpenState {
+    // Profile being switched to is already opened and has browsers opened.
+    PROFILE_OPENED = 0,
+    // Profile being switched to is already opened but has no browsers opened.
+    PROFILE_OPENED_NO_BROWSER,
+    // Profile being switched to is not opened.
+    PROFILE_UNOPENED
+  };
+
   // Enum for getting net counts for adding and deleting users.
   enum ProfileNetUserCounts {
     ADD_NEW_USER = 0,         // Total count of add new user
     PROFILE_DELETED,          // User deleted a profile
     NUM_PROFILE_NET_METRICS
   };
 
   // Sign in is logged once the user has entered their GAIA information.
   // The options for sync are logged after the user has submitted the options
   // form. See sync_setup_handler.h.
@@ skipping 119 matching lines @@
     // User selects 'Not You?' in the upgrade bubble.
     PROFILE_AVATAR_MENU_UPGRADE_NOT_YOU,
     NUM_PROFILE_AVATAR_MENU_UPGRADE_METRICS,
   };
 
   static void UpdateReportedProfilesStatistics(ProfileManager* manager);
   // Count and return summary information about the profiles currently in the
   // |manager|. This information is returned in the output variable |counts|.
   static bool CountProfileInformation(ProfileManager* manager,
                                       ProfileCounts* counts);
+  static ProfileOpenState GetProfileOpenState(ProfileManager* manager,

[Mike Lerman, 2015/01/23 19:46:14]

GetProfileOpenState isn't called outside of profile_metrics and is defined in
the anonymous namespace. You can remove it from the header file.

I think the ProfileOpenState enum can also be removed from the header file, and
declared in the .cc's anonymous namespace.

[anthonyvd, 2015/01/26 16:07:48]

Done.

+                                              const base::FilePath& path);
 
+  static void LogNumberOfProfileSwitches();
   static void LogNumberOfProfiles(ProfileManager* manager);
   static void LogProfileAddNewUser(ProfileAdd metric);
   static void LogProfileAvatarSelection(size_t icon_index);
   static void LogProfileDeleteUser(ProfileDelete metric);
   static void LogProfileOpenMethod(ProfileOpen metric);
+  static void LogProfileSwitch(ProfileOpen metric,
+                               ProfileManager* manager,
+                               const base::FilePath& profile_path);
   static void LogProfileSwitchGaia(ProfileGaia metric);
-  static void LogProfileSwitchUser(ProfileOpen metric);
   static void LogProfileSyncInfo(ProfileSync metric);
   static void LogProfileAuthResult(ProfileAuth metric);
   static void LogProfileDesktopMenu(ProfileDesktopMenu metric,
                                     signin::GAIAServiceType gaia_service);
   static void LogProfileDelete(bool profile_was_signed_in);
   static void LogProfileNewAvatarMenuNotYou(ProfileNewAvatarMenuNotYou metric);
   static void LogProfileNewAvatarMenuSignin(ProfileNewAvatarMenuSignin metric);
   static void LogProfileNewAvatarMenuUpgrade(
       ProfileNewAvatarMenuUpgrade metric);
 
 #if defined(OS_ANDROID)
   static void LogProfileAndroidAccountManagementMenu(
       ProfileAndroidAccountManagementMenu metric,
       signin::GAIAServiceType gaia_service);
 #endif  // defined(OS_ANDROID)
 
   // These functions should only be called on the UI thread because they hook
   // into g_browser_process through a helper function.
   static void LogProfileLaunch(Profile* profile);
   static void LogProfileSyncSignIn(const base::FilePath& profile_path);
   static void LogProfileUpdate(const base::FilePath& profile_path);
 };
 
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_METRICS_H_