[Password Manager] Switch password manager code to use "base/feature_list.h".

components/password_manager/core/common/password_manager_features.h

Index: components/password_manager/core/common/password_manager_features.h
diff --git a/components/password_manager/core/common/password_manager_features.h b/components/password_manager/core/common/password_manager_features.h
new file mode 100644
index 0000000000000000000000000000000000000000..68390eb257dff5ff96052df30b8e8d0473f83a82
--- /dev/null
+++ b/components/password_manager/core/common/password_manager_features.h
@@ -0,0 +1,28 @@
+// Copyright 2015 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_COMMON_PASSWORD_MANAGER_FEATURES_H_
+#define COMPONENTS_PASSWORD_MANAGER_CORE_COMMON_PASSWORD_MANAGER_FEATURES_H_
+
+// This file defines all the base::FeatureList features for the Password Manager
+// module.
+
+#include "base/feature_list.h"
+
+namespace password_manager {
+
+namespace features {
+
+// All features in alphabetical order. The features should be documented
+// alongside the definition of their values in the .cc file.
+
+extern const base::Feature kEnableAutomaticPasswordSaving;
+extern const base::Feature kEnablePasswordChangeSupport;
+extern const base::Feature kEnablePasswordForceSaving;
+
+}  // namespace features
+
+}  // namespace password_manager
+
+#endif  // COMPONENTS_PASSWORD_MANAGER_CORE_COMMON_PASSWORD_MANAGER_FEATURES_H_