cros: Use SessionController to enable system tray settings / notifications tray

chrome/browser/chromeos/login/user_flow.h

Index: chrome/browser/chromeos/login/user_flow.h
diff --git a/chrome/browser/chromeos/login/user_flow.h b/chrome/browser/chromeos/login/user_flow.h
index 23c9094ac5f033cf93043b919288d1c5016bf3bd..a11b004e037f49736329553a8657f3c00dd5bd73 100644
--- a/chrome/browser/chromeos/login/user_flow.h
+++ b/chrome/browser/chromeos/login/user_flow.h
@@ -29,8 +29,13 @@ class UserFlow {
   // Indicates if screen locking should be enabled or disabled for a flow.
   virtual bool CanLockScreen() = 0;
   virtual bool CanStartArc() = 0;
-  virtual bool ShouldShowSettings() = 0;
+
+  // Whether or not the settings icon should be enabled in the system tray menu.
+  virtual bool ShouldEnableSettings() = 0;
+
+  // Whether or not the notifications tray should be visible.
   virtual bool ShouldShowNotificationTray() = 0;
+
   virtual bool ShouldLaunchBrowser() = 0;
   virtual bool ShouldSkipPostLoginScreens() = 0;
   virtual bool SupportsEarlyRestartToApplyFlags() = 0;
@@ -55,10 +60,11 @@ class DefaultUserFlow : public UserFlow {
  public:
   ~DefaultUserFlow() override;
 
+  // UserFlow:
   void AppendAdditionalCommandLineSwitches() override;
   bool CanLockScreen() override;
   bool CanStartArc() override;
-  bool ShouldShowSettings() override;
+  bool ShouldEnableSettings() override;
   bool ShouldShowNotificationTray() override;
   bool ShouldLaunchBrowser() override;
   bool ShouldSkipPostLoginScreens() override;
@@ -77,8 +83,9 @@ class ExtendedUserFlow : public UserFlow {
   explicit ExtendedUserFlow(const AccountId& account_id);
   ~ExtendedUserFlow() override;
 
+  // UserFlow:
   void AppendAdditionalCommandLineSwitches() override;
-  bool ShouldShowSettings() override;
+  bool ShouldEnableSettings() override;
   bool ShouldShowNotificationTray() override;
   void HandleOAuthTokenStatusChange(
       user_manager::User::OAuthTokenStatus status) override;