chromeos: Remove some IME methods from ash::SystemTrayDelegate

chrome/browser/ui/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/chromecast_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 1318 matching lines @@
       "ash/chrome_launcher_prefs.h",
       "ash/chrome_new_window_client.cc",
       "ash/chrome_new_window_client.h",
       "ash/chrome_screenshot_grabber.cc",
       "ash/chrome_screenshot_grabber.h",
       "ash/chrome_shell_content_state.cc",
       "ash/chrome_shell_content_state.h",
       "ash/chrome_shell_content_state_chromeos.cc",
       "ash/chrome_shell_delegate.cc",
       "ash/chrome_shell_delegate.h",
-      "ash/ime_controller_chromeos.cc",
-      "ash/ime_controller_chromeos.h",
       "ash/keyboard_ui_service.cc",
       "ash/keyboard_ui_service.h",
       "ash/launcher/app_shortcut_launcher_item_controller.cc",
       "ash/launcher/app_shortcut_launcher_item_controller.h",
       "ash/launcher/app_window_launcher_controller.cc",
       "ash/launcher/app_window_launcher_controller.h",
       "ash/launcher/app_window_launcher_item_controller.cc",
       "ash/launcher/app_window_launcher_item_controller.h",
       "ash/launcher/arc_playstore_shortcut_launcher_item_controller.cc",
       "ash/launcher/arc_playstore_shortcut_launcher_item_controller.h",
@@ skipping 2253 matching lines @@
     deps += [
       "//chrome/test:test_support_ui",
       "//components/zoom",
     ]
   }
 
   if (enable_extensions) {
     deps += [ "//extensions/browser" ]
   }
 }