[Password Manager] Show omnibox icon and anchored prompt once user start typing password

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 81bb94a20628a1828638517559a7334b5766987f..0756fec125f1c7be9cc4ffa3d059f50165b39f26 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1545,6 +1545,11 @@ const FeatureEntry kFeatureEntries[] = {
      flag_descriptions::kPasswordForceSavingDescription, kOsAll,
      FEATURE_VALUE_TYPE(
          password_manager::features::kEnablePasswordForceSaving)},
+    {"enable-manual-fallback-for-password-saving",
+     flag_descriptions::kManualFallbackForPasswordSavingName,
+     flag_descriptions::kManualFallbackForPasswordSavingDescription, kOsDesktop,
+     FEATURE_VALUE_TYPE(
+         password_manager::features::kEnableManualFallbackForSaving)},
     {"enable-manual-password-generation",
      flag_descriptions::kManualPasswordGenerationName,
      flag_descriptions::kManualPasswordGenerationDescription, kOsAll,