[Autofill] Add Chrome flag that annotates web forms with form and field signatures

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 0cb8b9e51887730ff677b0c6cdf35156ff7dd50a..099e172428b1d1c31085bf01e0760127a9f97d41 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -5885,6 +5885,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_MANUAL_PASSWORD_GENERATION_DESCRIPTION" desc="Description of the flag for manual password generation.">
         Allow the user to manually enforce to generate password on a password field.
       </message>
+      <message name="IDS_FLAGS_SHOW_AUTOFILL_SIGNATURES" desc="Name of the flag to show autofill signatures.">
+        Show autofill signatures.
+      </message>
+      <message name="IDS_FLAGS_SHOW_AUTOFILL_SIGNATURES_DESCRIPTION" desc="Description of the flag to show autofill signatures.">
+        Annotates web forms with Autofill signatures as HTML attributes.
+      </message>
       <message name="IDS_PASSWORD_MANAGER_ACCOUNT_CHOOSER_TITLE_MANY_ACCOUNTS" desc="The title of the account chooser dialog/infobar for more than one account.">
         Choose your account saved with <ph name="PASSWORD_MANAGER_BRAND">$1<ex>Google Chrome</ex></ph> to sign in
       </message>