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

chrome/browser/component_updater/pepper_flash_component_installer.cc

Index: chrome/browser/component_updater/pepper_flash_component_installer.cc
diff --git a/chrome/browser/component_updater/pepper_flash_component_installer.cc b/chrome/browser/component_updater/pepper_flash_component_installer.cc
index 852d6ea3115475dfe4e8995d2b6f38315915f574..48633f89edb5ddb6eb82a0aee154a4a1157d78c4 100644
--- a/chrome/browser/component_updater/pepper_flash_component_installer.cc
+++ b/chrome/browser/component_updater/pepper_flash_component_installer.cc
@@ -46,7 +46,7 @@
 
 #if defined(OS_CHROMEOS)
 #include "chrome/browser/chromeos/settings/cros_settings.h"
-#include "chrome/browser/ui/ash/system_tray_delegate_chromeos.h"
+#include "chrome/browser/ui/ash/system_tray_client.h"
 #include "chrome/common/chrome_features.h"
 #include "chromeos/dbus/dbus_method_call_status.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
@@ -91,8 +91,7 @@ void LogRegistrationResult(chromeos::DBusMethodCallStatus call_status,
     LOG(ERROR) << "Component flash registration failed";
     return;
   }
-  chromeos::SystemTrayDelegateChromeOS* tray =
-      chromeos::SystemTrayDelegateChromeOS::instance();
+  chromeos::SystemTrayClient* tray = chromeos::SystemTrayClient::Get();
   if (tray) {
     tray->SetFlashUpdateAvailable();
   }