Disable AutoImport: experiment and histogram for analysis.

chrome/common/chrome_features.cc

Index: chrome/common/chrome_features.cc
diff --git a/chrome/common/chrome_features.cc b/chrome/common/chrome_features.cc
index 4a6612e252f0ebb93105a98691ece03db517db43..6dfd596a7cd40a8b1967d6926b34a228f787294a 100644
--- a/chrome/common/chrome_features.cc
+++ b/chrome/common/chrome_features.cc
@@ -48,6 +48,12 @@ const base::Feature kBlockSmallContent{"BlockSmallPluginContent",
 const base::Feature kBrowserHangFixesExperiment{
     "BrowserHangFixesExperiment", base::FEATURE_DISABLED_BY_DEFAULT};
 
+#if defined(OS_WIN)
+// Disables the AutoImport feature on first run. See crbug.com/555550
+const base::Feature kDisableFirstRunAutoImportWin{
+    "DisableFirstRunAutoImport", base::FEATURE_DISABLED_BY_DEFAULT};
+#endif
+
 // Experiment to display a toggle allowing users to opt-out of persisting a
 // Grant or Deny decision in a permission prompt.
 const base::Feature kDisplayPersistenceToggleInPermissionPrompts{