Make LogoutButtonTray a regular View

ash/system/network/tray_vpn.cc

Index: ash/system/network/tray_vpn.cc
diff --git a/ash/system/network/tray_vpn.cc b/ash/system/network/tray_vpn.cc
index 23a766d1121d91de96ae842b4a39618bca67953a..f6a9f9d73a0d315515424550f50a4f0c90f015ec 100644
--- a/ash/system/network/tray_vpn.cc
+++ b/ash/system/network/tray_vpn.cc
@@ -148,18 +148,14 @@ TrayVPN::TrayVPN(SystemTray* system_tray)
 
 TrayVPN::~TrayVPN() {}
 
-views::View* TrayVPN::CreateTrayView(LoginStatus status) {
-  return NULL;
-}
-
 views::View* TrayVPN::CreateDefaultView(LoginStatus status) {
-  CHECK(default_ == NULL);
+  CHECK(default_ == nullptr);
   if (!chromeos::NetworkHandler::IsInitialized())
-    return NULL;
+    return nullptr;
   if (status == LoginStatus::NOT_LOGGED_IN)
-    return NULL;
+    return nullptr;
   if (!tray::VpnDefaultView::ShouldShow())
-    return NULL;
+    return nullptr;
 
   const bool is_in_secondary_login_screen =
       Shell::Get()->session_controller()->IsInSecondaryLoginScreen();
@@ -172,9 +168,9 @@ views::View* TrayVPN::CreateDefaultView(LoginStatus status) {
 }
 
 views::View* TrayVPN::CreateDetailedView(LoginStatus status) {
-  CHECK(detailed_ == NULL);
+  CHECK(detailed_ == nullptr);
   if (!chromeos::NetworkHandler::IsInitialized())
-    return NULL;
+    return nullptr;
 
   WmShell::Get()->RecordUserMetricsAction(UMA_STATUS_AREA_DETAILED_VPN_VIEW);
   detailed_ = new tray::NetworkStateListDetailedView(
@@ -183,20 +179,14 @@ views::View* TrayVPN::CreateDetailedView(LoginStatus status) {
   return detailed_;
 }
 
-void TrayVPN::DestroyTrayView() {}
-
 void TrayVPN::DestroyDefaultView() {
-  default_ = NULL;
+  default_ = nullptr;
 }
 
 void TrayVPN::DestroyDetailedView() {
-  detailed_ = NULL;
+  detailed_ = nullptr;
 }
 
-void TrayVPN::UpdateAfterLoginStatusChange(LoginStatus status) {}
-
-void TrayVPN::UpdateAfterShelfAlignmentChange(ShelfAlignment alignment) {}
-
 void TrayVPN::NetworkStateChanged() {
   if (default_)
     default_->Update();