Update the "Passwords and Forms" section so that they can be toggled.

chrome/browser/ui/webui/settings/passwords_handler.cc

+// 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.
+
+#include "chrome/browser/ui/webui/settings/passwords_handler.h"
+
+#include "base/bind.h"
+#include "base/prefs/pref_service.h"
+#include "chrome/browser/profiles/profile.h"
+#include "components/password_manager/core/common/password_manager_pref_names.h"
+#include "content/public/browser/web_ui.h"
+
+namespace settings {
+
+PasswordsHandler::PasswordsHandler(content::WebUI* webui)
+    : profile_(Profile::FromWebUI(webui)) {}
+
+PasswordsHandler::~PasswordsHandler() {}
+
+void PasswordsHandler::RegisterMessages() {
+  web_ui()->RegisterMessageCallback(
+      "setPasswordSaving", base::Bind(&PasswordsHandler::HandleSetPaswordSaving,
+                                      base::Unretained(this)));
+}
+
+void PasswordsHandler::HandleSetPaswordSaving(const base::ListValue* args) {
+  CHECK_EQ(1U, args->GetSize());
+  bool enabled = false;
+  CHECK(args->GetBoolean(0, &enabled));
+
+  PrefService* prefs = profile_->GetPrefs();
+  prefs->SetBoolean(password_manager::prefs::kPasswordManagerSavingEnabled,

[dschuyler, 2015/11/20 20:02:50]

Can this be exposed with settingsPrivate rather
than a chrome.send handler?

+                    enabled);
+}
+
+}  // namespace settings