chromeos: Move EnableScreenLock to PowerManagerClient from PowerLibrary

chrome/browser/chromeos/system/screen_locker_settings.cc

+// Copyright (c) 2011 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/chromeos/system/touchpad_settings.h"
+
+#include "base/bind.h"
+#include "base/file_path.h"
+#include "base/file_util.h"
+#include "base/stringprintf.h"
+#include "chrome/browser/chromeos/system/runtime_environment.h"
+#include "content/public/browser/browser_thread.h"
+
+using content::BrowserThread;
+
+namespace {
+
+const char kLockOnIdleSuspendPath[] =
+    "/var/lib/power_manager/lock_on_idle_suspend";
+
+void EnableScreenLockOnFileThread(bool enable) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
+
+  if (chromeos::system::runtime_environment::IsRunningOnChromeOS()) {
+    std::string config = base::StringPrintf("%d", enable);
+    file_util::WriteFile(FilePath(kLockOnIdleSuspendPath),
+                         config.c_str(),
+                         config.size());
+  }
+}
+
+}  // namespace
+
+namespace chromeos {
+namespace system {
+namespace screen_locker_settings {
+
+void EnableScreenLock(bool enable) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  // Run this on the FILE thread.
+  BrowserThread::PostTask(
+      BrowserThread::FILE, FROM_HERE,
+      base::Bind(&EnableScreenLockOnFileThread, enable));
+}
+
+}  // namespace screen_locker_settings
+}  // namespace system
+}  // namespace chromeos