Add local protection setting to chrome://settings/system

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

 // 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.
 
 #include "chrome/browser/ui/webui/settings/system_handler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
+#include "base/command_line.h"
 #include "base/metrics/user_metrics.h"
 #include "base/metrics/user_metrics_action.h"
+#include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/gpu/gpu_mode_manager.h"
 #include "chrome/browser/ui/webui/settings_utils.h"
+#include "chrome/common/chrome_switches.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/browser/web_ui_data_source.h"
 
+#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+#include "base/files/file_path.h"
+#include "chrome/common/chrome_paths_internal.h"
+#include "components/os_crypt/key_storage_util_linux.h"
+#endif  // defined(OS_LINUX) && !defined(OS_CHROMEOS)
+
 namespace settings {
 
 SystemHandler::SystemHandler() {}
 
 SystemHandler::~SystemHandler() {}
 
 // static
 void SystemHandler::AddLoadTimeData(content::WebUIDataSource* data_source) {
   data_source->AddBoolean("hardwareAccelerationEnabledAtStartup",
       g_browser_process->gpu_mode_manager()->initial_gpu_mode_pref());
+
+#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+  data_source->AddBoolean("hideProtectionSetting",
+                          !base::CommandLine::ForCurrentProcess()->HasSwitch(
+                              switches::kEnableEncryptionSelection));
+  base::FilePath user_data_dir;
+  chrome::GetDefaultUserDataDirectory(&user_data_dir);
+  data_source->AddBoolean("protectionSetting",
+                          !os_crypt::GetBackendUse(user_data_dir));
+#endif  // defined(OS_LINUX) && !defined(OS_CHROMEOS)
 }
 
 void SystemHandler::RegisterMessages() {
   web_ui()->RegisterMessageCallback(
       "showProxySettings", base::Bind(&SystemHandler::HandleShowProxySettings,
                                       base::Unretained(this)));
+#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+  web_ui()->RegisterMessageCallback(
+      "updateProtectionSetting",
+      base::Bind(&SystemHandler::HandleUpdateProtectionSetting,
+                 base::Unretained(this)));
+#endif  // defined(OS_LINUX) && !defined(OS_CHROMEOS)
 }
 
 void SystemHandler::HandleShowProxySettings(const base::ListValue* /*args*/) {
   base::RecordAction(base::UserMetricsAction("Options_ShowProxySettings"));
   settings_utils::ShowNetworkProxySettings(web_ui()->GetWebContents());
 }
 
+#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
+void SystemHandler::HandleUpdateProtectionSetting(const base::ListValue* args) {
+  bool disableEncryption = args->GetList()[0].GetBool();
+  base::FilePath user_data_dir;
+  chrome::GetDefaultUserDataDirectory(&user_data_dir);
+  os_crypt::WriteBackendUse(user_data_dir, !disableEncryption);
+}
+#endif  // defined(OS_LINUX) && !defined(OS_CHROMEOS)
+
 }  // namespace settings