Add a pref checkbox to enable/disable screen lock for ChromeOs.

chrome/browser/chromeos/cros/power_library.cc

 // Copyright (c) 2009 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/cros/power_library.h"
 
 #include "base/message_loop.h"
 #include "base/string_util.h"
 #include "chrome/browser/chrome_thread.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
@@ skipping 41 matching lines @@
   }
 
   base::TimeDelta battery_time_to_empty() const {
     return base::TimeDelta::FromSeconds(status_.battery_time_to_empty);
   }
 
   base::TimeDelta battery_time_to_full() const {
     return base::TimeDelta::FromSeconds(status_.battery_time_to_full);
   }
 
+  virtual void EnableScreenLock(bool enable) {
+    if (!CrosLibrary::Get()->EnsureLoaded())
+      return;
+
+    // Make sure we run on FILE thread becuase chromeos::EnableScreenLock
+    // would write power manager config file to disk.
+    if (!ChromeThread::CurrentlyOn(ChromeThread::FILE)) {
+      ChromeThread::PostTask(
+          ChromeThread::FILE, FROM_HERE,
+          NewRunnableMethod(this, &PowerLibraryImpl::EnableScreenLock, enable));
+      return;
+    }
+
+    chromeos::EnableScreenLock(enable);
+  }
+
  private:
   static void PowerStatusChangedHandler(void* object,
       const chromeos::PowerStatus& status) {
     PowerLibraryImpl* power = static_cast<PowerLibraryImpl*>(object);
     power->UpdatePowerStatus(status);
   }
 
   void Init() {
     power_status_connection_ = chromeos::MonitorPowerStatus(
         &PowerStatusChangedHandler, this);
@@ skipping 40 matching lines @@
   bool line_power_on() const { return false; }
   bool battery_is_present() const { return false; }
   bool battery_fully_charged() const { return false; }
   double battery_percentage() const { return false; }
   base::TimeDelta battery_time_to_empty() const {
     return base::TimeDelta::FromSeconds(0);
   }
   base::TimeDelta battery_time_to_full() const {
     return base::TimeDelta::FromSeconds(0);
   }
+  virtual void EnableScreenLock(bool enable) {}
 };
 
 // static
 PowerLibrary* PowerLibrary::GetImpl(bool stub) {
   if (stub)
     return new PowerLibraryStubImpl();
   else
     return new PowerLibraryImpl();
 }
 
 }  // namespace chromeos
 
 // Allows InvokeLater without adding refcounting. This class is a Singleton and
 // won't be deleted until it's last InvokeLater is run.
 DISABLE_RUNNABLE_METHOD_REFCOUNT(chromeos::PowerLibraryImpl);