Revert of Remove InputMethodEventHandler.

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 159 matching lines @@
     "host/ash_window_tree_host_init_params.h",
     "host/ash_window_tree_host_platform.cc",
     "host/ash_window_tree_host_platform.h",
     "host/ash_window_tree_host_unified.cc",
     "host/ash_window_tree_host_unified.h",
     "host/ash_window_tree_host_x11.cc",
     "host/ash_window_tree_host_x11.h",
     "host/root_window_transformer.h",
     "host/transformer_helper.cc",
     "host/transformer_helper.h",
+    "ime/input_method_event_handler.cc",
+    "ime/input_method_event_handler.h",
     "ime_control_delegate.h",
     "key_event_watcher.cc",
     "key_event_watcher.h",
     "keyboard/keyboard_observer_register.cc",
     "keyboard/keyboard_observer_register.h",
     "keyboard/keyboard_ui.cc",
     "keyboard/keyboard_ui.h",
     "keyboard/keyboard_ui_observer.h",
     "laser/laser_pointer_controller.cc",
     "laser/laser_pointer_controller.h",
@@ skipping 1318 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",
   ]
 }