Revert of ash: Use system tray mojo interface to show system update tray icon

chrome/browser/ui/ash/system_tray_delegate_chromeos_browsertest_chromeos.cc

Index: chrome/browser/ui/ash/system_tray_delegate_chromeos_browsertest_chromeos.cc
diff --git a/chrome/browser/ui/ash/system_tray_delegate_chromeos_browsertest_chromeos.cc b/chrome/browser/ui/ash/system_tray_delegate_chromeos_browsertest_chromeos.cc
index b061e67fa5f22e9da1576509914f31c3fd98d10b..8d3752fdc786791784bf311bddae54622d35b4dc 100644
--- a/chrome/browser/ui/ash/system_tray_delegate_chromeos_browsertest_chromeos.cc
+++ b/chrome/browser/ui/ash/system_tray_delegate_chromeos_browsertest_chromeos.cc
@@ -13,6 +13,8 @@
 #include "ash/common/system/date/tray_date.h"
 #include "ash/common/system/date/tray_system_info.h"
 #include "ash/common/system/tray/system_tray.h"
+#include "ash/common/system/update/tray_update.h"
+#include "ash/common/wm_shell.h"
 #include "ash/shell.h"
 #include "base/macros.h"
 #include "chrome/browser/chromeos/login/login_manager_test.h"
@@ -129,4 +131,29 @@
   EXPECT_EQ(base::k24HourClock, GetHourType());
 }
 
+// Test that a flash update causes the update UI to show in the system menu.
+IN_PROC_BROWSER_TEST_F(SystemTrayDelegateChromeOSTest,
+                       TestFlashUpdateTrayIcon) {
+  ash::TrayUpdate* tray_update = ash::Shell::GetInstance()
+                                     ->GetPrimarySystemTray()
+                                     ->GetTrayUpdateForTesting();
+
+  ash::UpdateInfo initial_info;
+  ash::WmShell::Get()->system_tray_delegate()->GetSystemUpdateInfo(
+      &initial_info);
+  EXPECT_FALSE(initial_info.update_required);
+
+  // When no update is pending, the item isn't visible.
+  EXPECT_FALSE(tray_update->tray_view()->visible());
+
+  chromeos::SystemTrayDelegateChromeOS::instance()->SetFlashUpdateAvailable();
+
+  ash::UpdateInfo post_info;
+  ash::WmShell::Get()->system_tray_delegate()->GetSystemUpdateInfo(&post_info);
+  EXPECT_TRUE(post_info.update_required);
+
+  // Tray item is now visible.
+  EXPECT_TRUE(tray_update->tray_view()->visible());
+}
+
 }  // namespace chromeos