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

components/autofill/content/common/autofill_driver.mojom

Index: components/autofill/content/common/autofill_driver.mojom
diff --git a/components/autofill/content/common/autofill_driver.mojom b/components/autofill/content/common/autofill_driver.mojom
index ef4f93737be7eb2bbbf54ec2818ef6d07bf4514d..f04cf1af13a6464332dbc30c431da85dc2c7ecaa 100644
--- a/components/autofill/content/common/autofill_driver.mojom
+++ b/components/autofill/content/common/autofill_driver.mojom
@@ -77,6 +77,14 @@ interface PasswordManagerDriver {
 
   // Notification that this password form was submitted by the user.
   PasswordFormSubmitted(PasswordForm password_form);
+  
+  // Notification that a user starts typing in password fields and the omnibox
+  // icon with anchored save/update prompt should be available.
+  ShowManualFallbackForSaving(PasswordForm password_form);
+  
+  // Notification that there is no user input in password fields and the 
+  // save/update prompt anchored to the omnibox icon should be removed. 
+  HideManualFallbackForSaving();
 
   // Notification that in-page navigation happened and at this moment we have
   // filled password form. We use this as a signal for successful login.