Notify about major session changes events.

chrome/browser/ui/ash/session_state_delegate_chromeos.cc

Index: chrome/browser/ui/ash/session_state_delegate_chromeos.cc
diff --git a/chrome/browser/ui/ash/session_state_delegate_chromeos.cc b/chrome/browser/ui/ash/session_state_delegate_chromeos.cc
index 2341781f58215f13df01b9658a63e56a04f33597..ee59fcaedd1a95dfe1aec867bcdb5cd0381b46c0 100644
--- a/chrome/browser/ui/ash/session_state_delegate_chromeos.cc
+++ b/chrome/browser/ui/ash/session_state_delegate_chromeos.cc
@@ -20,13 +20,23 @@
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/session_manager_client.h"
+#include "chromeos/login/login_state.h"
 #include "google_apis/gaia/gaia_auth_util.h"
 
-SessionStateDelegateChromeos::SessionStateDelegateChromeos() {
+SessionStateDelegateChromeos::SessionStateDelegateChromeos()
+    : session_state_(STATE_LOGIN_PRIMARY),
+      initialized_(false) {
+  chromeos::LoginState::Get()->AddObserver(this);
   chromeos::UserManager::Get()->AddSessionStateObserver(this);
+  chromeos::UserAddingScreen::Get()->AddObserver(this);
+  SetSessionState(chromeos::LoginState::Get()->IsUserLoggedIn() ?
+      STATE_SESSION : STATE_LOGIN_PRIMARY, true);
 }
 
 SessionStateDelegateChromeos::~SessionStateDelegateChromeos() {
+  chromeos::LoginState::Get()->RemoveObserver(this);
+  chromeos::UserManager::Get()->RemoveSessionStateObserver(this);
+  chromeos::UserAddingScreen::Get()->RemoveObserver(this);
 }
 
 content::BrowserContext* SessionStateDelegateChromeos::GetBrowserContextByIndex(
@@ -111,6 +121,12 @@ bool SessionStateDelegateChromeos::IsUserSessionBlocked() const {
          chromeos::UserAddingScreen::Get()->IsRunning();
 }
 
+ash::SessionStateDelegate::SessionState
+SessionStateDelegateChromeos::GetSessionState() const {
+  DCHECK(initialized_);
+  return session_state_;
+}
+
 const base::string16 SessionStateDelegateChromeos::GetUserDisplayName(
     ash::MultiProfileIndex index) const {
   DCHECK_LT(index, NumberOfLoggedInUsers());
@@ -208,6 +224,11 @@ void SessionStateDelegateChromeos::RemoveSessionStateObserver(
   session_state_observer_list_.RemoveObserver(observer);
 }
 
+void SessionStateDelegateChromeos::LoggedInStateChanged() {
+  SetSessionState(chromeos::LoginState::Get()->IsUserLoggedIn() ?
+      STATE_SESSION : STATE_LOGIN_PRIMARY, false);
+}
+
 void SessionStateDelegateChromeos::ActiveUserChanged(
     const chromeos::User* active_user) {
   FOR_EACH_OBSERVER(ash::SessionStateObserver,
@@ -221,3 +242,28 @@ void SessionStateDelegateChromeos::UserAddedToSession(
                     session_state_observer_list_,
                     UserAddedToSession(added_user->email()));
 }
+
+void SessionStateDelegateChromeos::OnUserAddingStarted() {
+  SetSessionState(STATE_LOGIN_SECONDARY, false);
+}
+
+void SessionStateDelegateChromeos::OnUserAddingFinished() {
+  SetSessionState(STATE_SESSION, false);
+}
+
+void SessionStateDelegateChromeos::SetSessionState(SessionState new_state,
+                                                   bool force) {
+  if (session_state_ == new_state && !force)
+    return;
+
+  initialized_ = true;
+  session_state_ = new_state;
+  NotifySessionStateChanged();
+}
+
+void SessionStateDelegateChromeos::NotifySessionStateChanged() {
+  DCHECK(initialized_);
+  FOR_EACH_OBSERVER(ash::SessionStateObserver,
+                    session_state_observer_list_,
+                    SessionStateChanged(session_state_));
+}