Requery the autofill server when forms and input fields are dynamically added.

components/autofill/common/forms_seen_state.h

Index: components/autofill/common/forms_seen_state.h
diff --git a/components/autofill/common/forms_seen_state.h b/components/autofill/common/forms_seen_state.h
new file mode 100644
index 0000000000000000000000000000000000000000..5f6f582f5d963091c724b0c1eaacbc408ffa0fb2
--- /dev/null
+++ b/components/autofill/common/forms_seen_state.h
@@ -0,0 +1,22 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_AUTOFILL_COMMON_FORMS_SEEN_PARAM_H_
+#define COMPONENTS_AUTOFILL_COMMON_FORMS_SEEN_PARAM_H_
+
+namespace autofill {
+
+// Specifies the nature of the forms triggering the call.
+enum FormsSeenState {
+  // Forms present on page load with no additional unsent forms.
+  NO_SPECIAL_FORMS_SEEN = 0,
+  // If this an Autocheckout page, there are more that should be checked.
+  PARTIAL_FORMS_SEEN = 1,
+  // Forms were added dynamically post-page load.
+  DYNAMIC_FORMS_SEEN = 2,
+};
+
+}  // namespace autofill
+
+#endif  // COMPONENTS_AUTOFILL_COMMON_FORMS_SEEN_PARAM_H_