Make profile statistics tasks inspectable by tests

chrome/browser/profiles/profile_manager.cc

Index: chrome/browser/profiles/profile_manager.cc
diff --git a/chrome/browser/profiles/profile_manager.cc b/chrome/browser/profiles/profile_manager.cc
index 070486a578cdf11ba175d370d1a20d130bbd1308..e243830b45d9ce9accfc4db11eff6075750bf29a 100644
--- a/chrome/browser/profiles/profile_manager.cc
+++ b/chrome/browser/profiles/profile_manager.cc
@@ -1071,8 +1071,8 @@ void ProfileManager::DoFinalInit(Profile* profile, bool go_off_the_record) {
   if (!profile->IsGuestSession() && !profile->IsSystemProfile() &&
       !profile->IsNewProfile() && !go_off_the_record &&
       profile->GetLastSessionExitType() != Profile::EXIT_NORMAL) {
-    profiles::GatherProfileStatistics(
-        profile, profiles::ProfileStatisticsCallback(), nullptr);
+    ProfileStatistics::GatherProfileStatistics(
+        profile, profiles::ProfileStatisticsCallback());
   }
 }
 
@@ -1501,8 +1501,8 @@ void ProfileManager::BrowserListObserver::OnBrowserRemoved(
     // Gather statistics and store into ProfileInfoCache. For incognito profile
     // we gather the statistics of its parent profile instead, because a window
     // of the parent profile was open.
-    profiles::GatherProfileStatistics(
-        original_profile, profiles::ProfileStatisticsCallback(), nullptr);
+    ProfileStatistics::GatherProfileStatistics(
+        original_profile, profiles::ProfileStatisticsCallback());
   }
 }