Add decoration to the language button to indicate that a third party IME is in use

ash/system/ime/tray_ime.cc

Index: ash/system/ime/tray_ime.cc
diff --git a/ash/system/ime/tray_ime.cc b/ash/system/ime/tray_ime.cc
index 386fde5e9e962d4ff92e89a87068423f61bbd16e..b33462e4a49263b234902e2bd271bdbb1abcccb4 100644
--- a/ash/system/ime/tray_ime.cc
+++ b/ash/system/ime/tray_ime.cc
@@ -227,7 +227,12 @@ TrayIME::~TrayIME() {
 
 void TrayIME::UpdateTrayLabel(const IMEInfo& current, size_t count) {
   if (tray_label_) {
-    tray_label_->label()->SetText(current.short_name);
+    if (current.third_party) {
+      // TODO(zork): Update this decoration.
+      tray_label_->label()->SetText(current.short_name + UTF8ToUTF16("(3rd)"));
+    } else {
+      tray_label_->label()->SetText(current.short_name);
+    }
     tray_label_->SetVisible(count > 1);
   }
 }