Add a flag to ignore autocomplete="off" for Autofill.

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 20efe3c376e3f29aeaf80b5b4ba4ddfdf96c6717..f4c2bdc976fc7c54db15592b0359114c6bc2caf0 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1655,6 +1655,13 @@ const Experiment kExperiments[] = {
     SINGLE_VALUE_TYPE(autofill::switches::kDisableIgnoreAutocompleteOff)
   },
   {
+    "ignore-autocomplete-off-autofill",
+    IDS_FLAGS_IGNORE_AUTOCOMPLETE_OFF_AUTOFILL_NAME,
+    IDS_FLAGS_IGNORE_AUTOCOMPLETE_OFF_AUTOFILL_DESCRIPTION,
+    kOsCrOS | kOsMac | kOsWin | kOsLinux,
+    SINGLE_VALUE_TYPE(autofill::switches::kIgnoreAutocompleteOffForAutofill)
+  },
+  {
     "enable-permissions-bubbles",
     IDS_FLAGS_ENABLE_PERMISSIONS_BUBBLES_NAME,
     IDS_FLAGS_ENABLE_PERMISSIONS_BUBBLES_DESCRIPTION,