Notify about major session changes events.

ash/session_state_delegate_stub.cc

Index: ash/session_state_delegate_stub.cc
diff --git a/ash/session_state_delegate_stub.cc b/ash/session_state_delegate_stub.cc
index dcbd346dfd478123008ebb3f243995d8b1be8c96..149f92105b570ea6d04da71c41c20432c47aaa42 100644
--- a/ash/session_state_delegate_stub.cc
+++ b/ash/session_state_delegate_stub.cc
@@ -69,6 +69,15 @@ bool SessionStateDelegateStub::IsUserSessionBlocked() const  {
   return !IsActiveUserSessionStarted() || IsScreenLocked();
 }
 
+SessionStateDelegate::SessionState SessionStateDelegateStub::GetSessionState()
+    const {
+  if (IsScreenLocked())
+    return STATE_LOCK;
+
+  // Assuming that if session is not active we're at login.

[Daniel Erat, 2014/04/10 16:30:32]

nit: s/Assuming/Assume/

[Nikita (slow), 2014/04/10 17:22:51]

Done.

+  return IsActiveUserSessionStarted() ? STATE_SESSION : STATE_LOGIN_PRIMARY;
+}
+
 const base::string16 SessionStateDelegateStub::GetUserDisplayName(
     MultiProfileIndex index) const {
   return base::UTF8ToUTF16("stub-user");