[Autofill] Enable Autofill for dynamically created forms.

components/autofill/core/browser/autofill_manager.cc

 // 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.
 
 #include "components/autofill/core/browser/autofill_manager.h"
 
 #include <stddef.h>
 
 #include <limits>
 #include <map>
@@ skipping 294 matching lines @@
                    base::Owned(submitted_form.release()),
                    forms_loaded_timestamp_,
                    initial_interaction_timestamp_,
                    timestamp));
   }
 
   return true;
 }
 
 void AutofillManager::OnFormsSeen(const std::vector<FormData>& forms,
-                                  const TimeTicks& timestamp,
-                                  autofill::FormsSeenState state) {
+                                  const TimeTicks& timestamp) {
   if (!IsValidFormDataVector(forms))
     return;
 
-  bool is_post_document_load = state == autofill::DYNAMIC_FORMS_SEEN;
-  // If new forms were added dynamically, treat as a new page.
-  if (is_post_document_load)
-    Reset();
-
   if (!driver_->RendererIsAvailable())
     return;
 
   bool enabled = IsAutofillEnabled();
   if (!has_logged_autofill_enabled_) {
     metric_logger_->LogIsAutofillEnabledAtPageLoad(enabled);
     has_logged_autofill_enabled_ = true;
   }
 
   if (!enabled)
@@ skipping 832 matching lines @@
     return false;
 
   // Disregard forms that we wouldn't ever autofill in the first place.
   if (!form.ShouldBeParsed(true))
     return false;
 
   return true;
 }
 
 }  // namespace autofill