Eliminate all code related to the AutomaticProfileResetter.

chrome/browser/prefs/browser_prefs.cc

Index: chrome/browser/prefs/browser_prefs.cc
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index dfdb4ae803749ec10fec75b5e4367ff65785a5e8..af6e423d89da9755151982a2b44ce041af771086 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -136,7 +136,6 @@
 #include "chrome/browser/android/new_tab_page_prefs.h"
 #else
 #include "chrome/browser/notifications/sync_notifier/chrome_notifier_service.h"
-#include "chrome/browser/profile_resetter/automatic_profile_resetter_factory.h"
 #include "chrome/browser/ui/autofill/generated_credit_card_bubble_controller.h"
 #endif
 
@@ -221,6 +220,13 @@ const char kBackupPref[] = "backup";
 // The sync promo error message preference has been removed; this pref will
 // be cleared from user data.
 const char kSyncPromoErrorMessage[] = "sync_promo.error_message";
+
+// The AutomaticProfileResetter service, which has been unimplemented, used to
+// use this preference to save that the profile reset prompt had already been
+// shown. We keep the name here for now so that we can clear out legacy values
+// that might be retained in Preferences and/or Local State.
+// TODO(engedy): Remove this and usages in M42 or later. See crbug.com/398813.
+const char kProfileResetPromptMemento[] = "profile.reset_prompt_memento";
 #endif
 
 }  // namespace
@@ -286,7 +292,6 @@ void RegisterLocalState(PrefRegistrySimple* registry) {
 #endif  // defined(ENABLE_TASK_MANAGER)
 
 #if !defined(OS_ANDROID)
-  AutomaticProfileResetterFactory::RegisterPrefs(registry);
   BackgroundModeManager::RegisterPrefs(registry);
   RegisterBrowserPrefs(registry);
 #if !defined(OS_CHROMEOS)
@@ -343,6 +348,12 @@ void RegisterLocalState(PrefRegistrySimple* registry) {
 #if defined(TOOLKIT_VIEWS)
   RegisterBrowserViewLocalPrefs(registry);
 #endif
+
+  // Preferences registered only for migration (clearing or moving to a new key)
+  // go here.
+  #if !defined(OS_ANDROID)
+  registry->RegisterDictionaryPref(kProfileResetPromptMemento);
+  #endif  // !defined(OS_ANDROID)
 }
 
 // Register prefs applicable to all profiles.
@@ -476,8 +487,8 @@ void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
   ash::RegisterChromeLauncherUserPrefs(registry);
 #endif
 
-  // Prefs registered only for migration (clearing or moving to a new
-  // key) go here.
+  // Preferences registered only for migration (clearing or moving to a new key)
+  // go here.
   registry->RegisterDictionaryPref(
       kBackupPref,
       new base::DictionaryValue(),
@@ -487,6 +498,10 @@ void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry) {
       kSyncPromoErrorMessage,
       std::string(),
       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterStringPref(
+      kProfileResetPromptMemento,
+      std::string(),
+      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 #endif
 }
 
@@ -522,6 +537,10 @@ void MigrateUserPrefs(Profile* profile) {
   prefs->ClearPref(kSyncPromoErrorMessage);
 #endif
 
+#if !defined(OS_ANDROID)
+  prefs->ClearPref(kProfileResetPromptMemento);
+#endif
+
   PromoResourceService::MigrateUserPrefs(prefs);
   translate::TranslatePrefs::MigrateUserPrefs(prefs, prefs::kAcceptLanguages);
 
@@ -590,6 +609,10 @@ void MigrateBrowserPrefs(Profile* profile, PrefService* local_state) {
                             current_version);
   }
 
+#if !defined(OS_ANDROID)
+  local_state->ClearPref(kProfileResetPromptMemento);
+#endif
+
 #if defined(OS_CHROMEOS)
   chromeos::default_pinned_apps_field_trial::MigratePrefs(local_state);
 #endif