Revert "chromeos: move screen lock handling to power manager client"

chrome/browser/chromeos/accessibility/system_event_observer.cc

Index: chrome/browser/chromeos/accessibility/system_event_observer.cc
diff --git a/chrome/browser/chromeos/accessibility/system_event_observer.cc b/chrome/browser/chromeos/accessibility/system_event_observer.cc
index f6f6d5b817b0a84dcf1aca176c46639f5d98bb61..9972e4bbc5c30d8b2334bd45eeea41041568d318 100644
--- a/chrome/browser/chromeos/accessibility/system_event_observer.cc
+++ b/chrome/browser/chromeos/accessibility/system_event_observer.cc
@@ -6,6 +6,7 @@
 
 #include "base/logging.h"
 #include "chrome/browser/accessibility/accessibility_events.h"
+#include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/dbus/dbus_thread_manager.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/common/chrome_notification_types.h"
@@ -20,9 +21,11 @@ SystemEventObserver* g_system_event_observer = NULL;
 }
 
 SystemEventObserver::SystemEventObserver() {
+  CrosLibrary::Get()->GetScreenLockLibrary()->AddObserver(this);
 }
 
 SystemEventObserver::~SystemEventObserver() {
+  CrosLibrary::Get()->GetScreenLockLibrary()->RemoveObserver(this);
 }
 
 void SystemEventObserver::SystemResumed() {
@@ -32,16 +35,19 @@ void SystemEventObserver::SystemResumed() {
       chrome::NOTIFICATION_ACCESSIBILITY_WOKE_UP, &info);
 }
 
-void SystemEventObserver::LockScreen() {}
+void SystemEventObserver::LockScreen(ScreenLockLibrary* screen_lock_library) {
+}
 
-void SystemEventObserver::UnlockScreen() {
+void SystemEventObserver::UnlockScreen(ScreenLockLibrary* screen_lock_library) {
   Profile* profile = ProfileManager::GetDefaultProfile();
   ScreenUnlockedEventInfo info(profile);
   SendAccessibilityNotification(
       chrome::NOTIFICATION_ACCESSIBILITY_SCREEN_UNLOCKED, &info);
 }
 
-void SystemEventObserver::UnlockScreenFailed() {}
+void SystemEventObserver::UnlockScreenFailed(
+    ScreenLockLibrary* screen_lock_library) {
+}
 
 // static
 void SystemEventObserver::Initialize() {