chromeos: Remove SystemTrayDelegate::GetIMEManagedMessage()

ash/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
 
 # Historical note: Ash shipped on Windows for a couple years to support
@@ skipping 830 matching lines @@
     "//cc",
     "//cc/debug",
     "//cc/surfaces",
     "//chromeos",
     "//chromeos:power_manager_proto",
     "//components/device_event_log",
     "//components/onc",
     "//components/quirks",
     "//components/session_manager:base",
     "//components/signin/core/account_id",
+    "//components/strings:components_strings",
     "//components/ui_devtools",
     "//components/user_manager",
     "//components/vector_icons",
     "//components/wallpaper",
     "//device/bluetooth",
     "//gpu/command_buffer/client",
     "//gpu/command_buffer/client:gles2_interface",
     "//media",
     "//net",
     "//services/preferences/public/cpp",
@@ skipping 664 matching lines @@
     "//content/public/app:both",
     "//device/bluetooth",
   ]
 
   data_deps = [
     "//ash/strings:ash_test_strings",
     "//ash/resources:ash_test_resources_with_content_100_percent",
     "//ash/resources:ash_test_resources_200_percent",
   ]
 }