Run athena on chrome

chrome/browser/idle_chromeos.cc

Index: chrome/browser/idle_chromeos.cc
diff --git a/chrome/browser/idle_chromeos.cc b/chrome/browser/idle_chromeos.cc
index 62a72d46324bd95d8af0cc1a26a5ffcaeeb0c8c4..4d38a7335506a423f0e7cf18da846c1884a6b0f6 100644
--- a/chrome/browser/idle_chromeos.cc
+++ b/chrome/browser/idle_chromeos.cc
@@ -10,11 +10,20 @@
 #include "ui/wm/core/user_activity_detector.h"
 
 void CalculateIdleTime(IdleTimeCallback notify) {
+#if defined(USE_ATHENA)
+  // TODO(oshima): Implement this for athena. crbug.com/408752
+  base::TimeDelta idle_time;
+#else
   base::TimeDelta idle_time = base::TimeTicks::Now() -
       ash::Shell::GetInstance()->user_activity_detector()->last_activity_time();
+#endif
   notify.Run(static_cast<int>(idle_time.InSeconds()));
 }
 
 bool CheckIdleStateIsLocked() {
+#if defined(USE_ATHENA)
+  return false;
+#else
   return ash::Shell::GetInstance()->session_state_delegate()->IsScreenLocked();
+#endif
 }