Fire the onchange event when autocompleting usernames for password forms.

chrome/renderer/autofill/password_autofill_manager.cc

Index: chrome/renderer/autofill/password_autofill_manager.cc
diff --git a/chrome/renderer/autofill/password_autofill_manager.cc b/chrome/renderer/autofill/password_autofill_manager.cc
index cd3af54a97727350d26f1e8752b8e99385541e91..2d86597c24d712d3068ee4ab868d1429e084af87 100644
--- a/chrome/renderer/autofill/password_autofill_manager.cc
+++ b/chrome/renderer/autofill/password_autofill_manager.cc
@@ -314,7 +314,7 @@ bool PasswordAutofillManager::DidAcceptAutofillSuggestion(
 
   // Set the incoming |value| in the text field and |FillUserNameAndPassword|
   // will do the rest.
-  input.setValue(value);
+  input.setValue(value, true);
   return FillUserNameAndPassword(&input, &password.password_field,
                                  password.fill_data, true, true);
 }