Add UMA to track app launcher discoverability.

chrome/browser/ui/views/app_list/win/app_list_service_win.cc

Index: chrome/browser/ui/views/app_list/win/app_list_service_win.cc
diff --git a/chrome/browser/ui/views/app_list/win/app_list_service_win.cc b/chrome/browser/ui/views/app_list/win/app_list_service_win.cc
index 79daa07070cd78070fadb9fe87c108e8986d908b..e476d69f8235ea5ad1e56e81fea5a75df199d1a0 100644
--- a/chrome/browser/ui/views/app_list/win/app_list_service_win.cc
+++ b/chrome/browser/ui/views/app_list/win/app_list_service_win.cc
@@ -425,7 +425,7 @@ void AppListServiceWin::Init(Profile* initial_profile) {
 
   if (enable_app_list_on_next_init_) {
     enable_app_list_on_next_init_ = false;
-    EnableAppList(initial_profile);
+    EnableAppList(initial_profile, ENABLE_ON_REINSTALL);
     CreateShortcut();
   }
 
@@ -456,7 +456,7 @@ void AppListServiceWin::Init(Profile* initial_profile) {
       chrome_launcher_support::UninstallLegacyAppLauncher(
           chrome_launcher_support::USER_LEVEL_INSTALLATION);
     }
-    EnableAppList(initial_profile);
+    EnableAppList(initial_profile, ENABLE_ON_REINSTALL);
     CreateShortcut();
   }
 #endif
@@ -464,8 +464,7 @@ void AppListServiceWin::Init(Profile* initial_profile) {
   ScheduleWarmup();
 
   MigrateAppLauncherEnabledPref();
-  HandleCommandLineFlags(initial_profile);
-  SendUsageStats();
+  PerformStartupChecks(initial_profile);
 }
 
 void AppListServiceWin::CreateForProfile(Profile* profile) {