Introduce password_manager::FormSaver

components/password_manager/core/browser/stub_form_saver.h

Index: components/password_manager/core/browser/stub_form_saver.h
diff --git a/components/password_manager/core/browser/stub_form_saver.h b/components/password_manager/core/browser/stub_form_saver.h
new file mode 100644
index 0000000000000000000000000000000000000000..b389f2ce7705027316c0ae710814b505e9995c41
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+++ b/components/password_manager/core/browser/stub_form_saver.h
@@ -0,0 +1,38 @@
+// Copyright 2016 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_PASSWORD_MANAGER_CORE_BROWSER_STUB_FORM_SAVER_H_
+#define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_STUB_FORM_SAVER_H_
+
+#include "base/macros.h"
+#include "components/password_manager/core/browser/form_saver.h"
+
+namespace password_manager {
+
+// The no-op FormSaver stub to support tests.
+class StubFormSaver : public FormSaver {
+ public:
+  StubFormSaver() = default;
+
+  ~StubFormSaver() override = default;
+
+  // FormSaver:
+  void PermanentlyBlacklist(autofill::PasswordForm* observed) override {}
+  void Save(
+      const autofill::PasswordForm& pending,
+      bool is_new_login,
+      const autofill::PasswordFormMap& best_matches,
+      const std::vector<const autofill::PasswordForm*>* credentials_to_update,
+      const autofill::PasswordForm* old_primary_key) override {}
+  void PresaveGeneratedPassword(
+      const autofill::PasswordForm& generated) override {}
+  void RemovePresavedPassword() override {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(StubFormSaver);
+};
+
+}  // namespace password_manager
+
+#endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_STUB_FORM_SAVER_H_