Created optional multiprofiles introduction dialog.

chrome/browser/ui/ash/system_tray_delegate_chromeos.cc

Index: chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
diff --git a/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc b/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
index 6fb9aa19d3c691d05e4045c2cff368f4261d69f3..1588834a1210d9e82217c5cdd40d9b24911252ff 100644
--- a/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
+++ b/chrome/browser/ui/ash/system_tray_delegate_chromeos.cc
@@ -65,6 +65,7 @@
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/chromeos/options/network_config_view.h"
 #include "chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h"
+#include "chrome/browser/chromeos/profiles/multiprofiles_intro_dialog.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/browser/chromeos/sim_dialog_delegate.h"
 #include "chrome/browser/chromeos/system_key_event_listener.h"
@@ -238,6 +239,12 @@ void ShowNetworkSettingsPage(const std::string& service_path) {
       ProfileManager::GetPrimaryUserProfile());
 }
 
+void onAcceptMultiprofilesIntro(bool no_show_again) {
+  PrefService* prefs = ProfileManager::GetActiveUserProfile()->GetPrefs();
+  prefs->SetBoolean(prefs::kMultiProfileNeverShowIntro, no_show_again);
+  UserAddingScreen::Get()->Start();
+}
+
 class SystemTrayDelegate : public ash::SystemTrayDelegate,
                            public SessionManagerClient::Observer,
                            public drive::JobListObserver,
@@ -629,8 +636,16 @@ class SystemTrayDelegate : public ash::SystemTrayDelegate,
       return;
 
     // Launch sign in screen to add another user to current session.
-    if (UserManager::Get()->GetUsersAdmittedForMultiProfile().size())
-      UserAddingScreen::Get()->Start();
+    if (UserManager::Get()->GetUsersAdmittedForMultiProfile().size()) {
+      bool show_intro = !ProfileManager::GetActiveUserProfile()->
+          GetPrefs()->GetBoolean(prefs::kMultiProfileNeverShowIntro);
+      base::Callback<void(bool)> on_accept = base::Bind(
+          &onAcceptMultiprofilesIntro);
+      if (show_intro)
+        ShowMultiprofilesIntroDialog(on_accept);
+      else
+        UserAddingScreen::Get()->Start();
+    }
   }
 
   virtual void ShowSpringChargerReplacementDialog() OVERRIDE {