Disable AutoImport: experiment and histogram for analysis.

chrome/browser/chrome_browser_main.cc

Index: chrome/browser/chrome_browser_main.cc
diff --git a/chrome/browser/chrome_browser_main.cc b/chrome/browser/chrome_browser_main.cc
index 262d91c8b06ff3eeefc1474964e5284c8d531fe5..c0603dd587f3dd4e3fc91d55359dd90f4d7593b9 100644
--- a/chrome/browser/chrome_browser_main.cc
+++ b/chrome/browser/chrome_browser_main.cc
@@ -33,6 +33,7 @@
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_split.h"
+#include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/sys_info.h"
@@ -205,6 +206,7 @@
 
 #if defined(OS_WIN)
 #include "base/trace_event/trace_event_etw_export_win.h"
+#include "base/win/win_util.h"
 #include "base/win/windows_version.h"
 #include "chrome/app/file_pre_reader_win.h"
 #include "chrome/browser/chrome_browser_main_win.h"
@@ -290,6 +292,10 @@ using content::BrowserThread;
 
 namespace {
 
+// feature used to remove AutoImport on first run is default-off
+const base::Feature kDisableFirstRunAutoImport{
+    "DisableFirstRunAutoImport", base::FEATURE_DISABLED_BY_DEFAULT};
+
 // A provider of Geolocation services to override AccessTokenStore.
 class ChromeGeolocationDelegate : public device::GeolocationDelegate {
  public:
@@ -1798,11 +1804,24 @@ int ChromeBrowserMainParts::PreMainMessageLoopRunImpl() {
   // preferences are registered, since some of the code that the importer
   // touches reads preferences.
   if (first_run::IsChromeFirstRun()) {
-    first_run::AutoImport(profile_,
-                          master_prefs_->homepage_defined,
-                          master_prefs_->do_import_items,
-                          master_prefs_->dont_import_items,
-                          master_prefs_->import_bookmarks_path);
+    // By default, autoImport is performed on first run.
+    bool perform_autoImport_on_first_run = true;
+  // Part of a field trial that is designed to turn off the AutoImport feature
+  // for Windows users (on first run).
+  // The feature keeps running for enterprise.
+  #if defined(OS_WIN)
+  base::FieldTrial* trial =
+          base::FieldTrialList::Find("DisableFirstRunAutoImport");
+  perform_autoImport_on_first_run = !trial ||
+        !base::FeatureList::IsEnabled(kDisableFirstRunAutoImport) ||
+        base::win::IsEnrolledToDomain();
+  #endif
+    if (perform_autoImport_on_first_run) {
+      first_run::AutoImport(profile_, master_prefs_->homepage_defined,
+                            master_prefs_->do_import_items,
+                            master_prefs_->dont_import_items,
+                            master_prefs_->import_bookmarks_path);
+    }
 
     // Note: this can pop the first run consent dialog on linux.
     first_run::DoPostImportTasks(profile_,