fix "IME changed" notification uses a wrong field of IME

chrome/browser/chromeos/system/ash_system_tray_delegate.cc

Index: chrome/browser/chromeos/system/ash_system_tray_delegate.cc
diff --git a/chrome/browser/chromeos/system/ash_system_tray_delegate.cc b/chrome/browser/chromeos/system/ash_system_tray_delegate.cc
index 8bae9f60685c75ddfa9771efe1196e1892c1a10e..f48397666946ee8fe1bb03a20551dc2853682036 100644
--- a/chrome/browser/chromeos/system/ash_system_tray_delegate.cc
+++ b/chrome/browser/chromeos/system/ash_system_tray_delegate.cc
@@ -101,6 +101,7 @@ void ExtractIMEInfo(const input_method::InputMethodDescriptor& ime,
                     ash::IMEInfo* info) {
   info->id = ime.id();
   info->name = util.GetInputMethodLongName(ime);
+  info->medium_name = util.GetInputMethodMediumName(ime);
   info->short_name = util.GetInputMethodShortName(ime);
   info->third_party = ime.third_party();
 }