[Password Generation] Run the form classifier only if AutofillMetadata is enabled

components/autofill/content/renderer/password_generation_agent.h

 // 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_CONTENT_RENDERER_PASSWORD_GENERATION_AGENT_H_
 #define COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_GENERATION_AGENT_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 89 matching lines @@
   // Show UI for editing a generated password at |generation_element_|.
   void ShowEditingPopup();
 
   // Hides a password generation popup if one exists.
   void HidePopup();
 
   // Sets |generation_element_| to the focused password field and shows a
   // generation popup at this field.
   void OnUserTriggeredGeneratePassword();
 
+  // Enables the form classifier.
+  void OnAllowToRunFormClassifier();
+
   // Runs HTML parsing based classifier and saves its outcome to proto.
+  // TODO(crbug.com/621442): Remove client-side form classifier when server-side
+  // classifier is ready.
   void RunFormClassifierAndSaveVote(const blink::WebFormElement& web_form,
                                     const PasswordForm& form);
 
   // Creates a password form to presave a generated password. It copies behavior
   // of CreatePasswordFormFromWebForm/FromUnownedInputElements, but takes
   // |password_value| from |generation_element_| and empties |username_value|.
   // If a form creating is failed, returns an empty unique_ptr.
   std::unique_ptr<PasswordForm> CreatePasswordFormToPresave();
 
   // Stores forms that are candidates for account creation.
@@ skipping 37 matching lines @@
   bool generation_popup_shown_;
 
   // True if the editing popup was shown during this navigation. Used to track
   // UMA stats per page rather than per display, since the former is more
   // interesting.
   bool editing_popup_shown_;
 
   // If this feature is enabled. Controlled by Finch.
   bool enabled_;
 
+  // If the form classifier should run.
+  bool form_classifier_enabled_;
+
   // Unowned pointer. Used to notify PassowrdAutofillAgent when values
   // in password fields are updated.
   PasswordAutofillAgent* password_agent_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordGenerationAgent);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CONTENT_RENDERER_PASSWORD_GENERATION_AGENT_H_