Update AutoImport to import nothing by default (in absence of policy and master_prefs).

chrome/browser/ui/browser_ui_prefs.cc

Index: chrome/browser/ui/browser_ui_prefs.cc
diff --git a/chrome/browser/ui/browser_ui_prefs.cc b/chrome/browser/ui/browser_ui_prefs.cc
index c01a8466a080e60264af93080a12b5dadba77b2f..dcaf9764904d063825a71126c16e9326dcccfb63 100644
--- a/chrome/browser/ui/browser_ui_prefs.cc
+++ b/chrome/browser/ui/browser_ui_prefs.cc
@@ -71,12 +71,12 @@ void RegisterBrowserUserPrefs(user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterDictionaryPref(prefs::kBrowserWindowPlacement);
   registry->RegisterDictionaryPref(prefs::kBrowserWindowPlacementPopup);
   registry->RegisterDictionaryPref(prefs::kAppWindowPlacement);
-  registry->RegisterBooleanPref(prefs::kImportAutofillFormData, true);
-  registry->RegisterBooleanPref(prefs::kImportBookmarks, true);
-  registry->RegisterBooleanPref(prefs::kImportHistory, true);
-  registry->RegisterBooleanPref(prefs::kImportHomepage, true);
-  registry->RegisterBooleanPref(prefs::kImportSavedPasswords, true);
-  registry->RegisterBooleanPref(prefs::kImportSearchEngine, true);
+  registry->RegisterBooleanPref(prefs::kImportAutofillFormData, false);
+  registry->RegisterBooleanPref(prefs::kImportBookmarks, false);
+  registry->RegisterBooleanPref(prefs::kImportHistory, false);
+  registry->RegisterBooleanPref(prefs::kImportHomepage, false);
+  registry->RegisterBooleanPref(prefs::kImportSavedPasswords, false);
+  registry->RegisterBooleanPref(prefs::kImportSearchEngine, false);
   registry->RegisterBooleanPref(
       prefs::kEnableDoNotTrack,
       false,