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

components/autofill/renderer/autofill_agent.cc

Index: components/autofill/renderer/autofill_agent.cc
diff --git a/components/autofill/renderer/autofill_agent.cc b/components/autofill/renderer/autofill_agent.cc
index f32896b2e8693463d7216224ca6acb9a779ae97e..c083c57810d88d16cf6972690b893c77828ecbc9 100644
--- a/components/autofill/renderer/autofill_agent.cc
+++ b/components/autofill/renderer/autofill_agent.cc
@@ -152,6 +152,7 @@ AutofillAgent::AutofillAgent(content::RenderView* render_view,
       did_set_node_text_(false),
       autocheckout_click_in_progress_(false),
       is_whitelisted_for_autocheckout_(false),
+      has_new_forms_for_manager_(false),
       ignore_text_changes_(false),
       ALLOW_THIS_IN_INITIALIZER_LIST(weak_ptr_factory_(this)) {
   render_view->GetWebView()->setAutofillClient(this);
@@ -211,11 +212,14 @@ void AutofillAgent::DidFinishDocumentLoad(WebFrame* frame) {
     form_cache_.ExtractForms(*frame, &forms);
   }
 
+  autofill::FormsSeenParam param = has_more_forms ?
+      autofill::PARTIAL_FORMS_SEEN : autofill::NO_SPECIAL_FORMS_SEEN;
+
   // Always communicate to browser process for topmost frame.
   if (!forms.empty() || !frame->parent()) {
     Send(new AutofillHostMsg_FormsSeen(routing_id(), forms,
                                        forms_seen_timestamp_,
-                                       has_more_forms));
+                                       param));
   }
 }
 
@@ -725,7 +729,8 @@ void AutofillAgent::OnGetAllForms() {
 
   // Report to AutofillManager that all forms are being sent.
   Send(new AutofillHostMsg_FormsSeen(routing_id(), forms,
-                                     forms_seen_timestamp_, false));
+                                     forms_seen_timestamp_,
+                                     NO_SPECIAL_FORMS_SEEN));
 }
 
 void AutofillAgent::OnRequestAutocompleteResult(
@@ -773,6 +778,8 @@ void AutofillAgent::OnFillFormsAndClick(
 
 void AutofillAgent::OnWhitelistedForAutocheckout() {
   is_whitelisted_for_autocheckout_ = true;
+  if (has_new_forms_for_manager_)
+    MaybeSendDynamicFormsSeen();
 }
 
 void AutofillAgent::ClickFailed() {
@@ -932,4 +939,36 @@ void AutofillAgent::HideHostAutofillUi() {
   Send(new AutofillHostMsg_HideAutofillUi(routing_id()));
 }
 
+void AutofillAgent::didAssociateFormControls(
+    const WebKit::WebVector<WebKit::WebNode>& nodes) {
+  for (size_t i = 0; i < nodes.size(); ++i) {
+    WebKit::WebNode node = nodes[i];
+    if (node.document().frame() == topmost_frame_) {
+      forms_seen_timestamp_ = base::TimeTicks::Now();
+      has_new_forms_for_manager_ = true;
+      break;
+    }
+  }
+
+  if (has_new_forms_for_manager_ && is_whitelisted_for_autocheckout_)
+    MaybeSendDynamicFormsSeen();
+}
+
+void AutofillAgent::MaybeSendDynamicFormsSeen() {
+  has_new_forms_for_manager_ = false;
+  form_elements_.clear();
+
+  std::vector<FormData> forms;
+  bool has_more_forms = form_cache_.ExtractFormsAndFormElements(
+      *topmost_frame_, kRequiredAutofillFields, &forms, &form_elements_);
+  autofill::FormsSeenParam param = has_more_forms ?
+      autofill::PARTIAL_AND_DYNAMIC_FORMS_SEEN : autofill::DYNAMIC_FORMS_SEEN;
+
+  if (!forms.empty()) {
+    Send(new AutofillHostMsg_FormsSeen(routing_id(), forms,
+                                       forms_seen_timestamp_,
+                                       param));
+  }
+}
+
 }  // namespace autofill