[Remoting Host] Handle text event characters that are not presented on the keyboard

remoting/host/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/util/process_version.gni")
 import("//remoting/build/config/remoting_build.gni")
 
 group("all_tests") {
   testonly = true
 
@@ skipping 190 matching lines @@
     "ipc_video_frame_capturer.cc",
     "ipc_video_frame_capturer.h",
     "it2me_desktop_environment.cc",
     "it2me_desktop_environment.h",
     "linux/audio_pipe_reader.cc",
     "linux/audio_pipe_reader.h",
     "linux/certificate_watcher.cc",
     "linux/certificate_watcher.h",
     "linux/unicode_to_keysym.cc",
     "linux/unicode_to_keysym.h",
+    "linux/x11_character_injector.cc",
+    "linux/x11_character_injector.h",
+    "linux/x11_keyboard_impl.cc",
+    "linux/x11_keyboard_impl.h",
     "linux/x11_util.cc",
     "linux/x11_util.h",
     "linux/x_server_clipboard.cc",
     "linux/x_server_clipboard.h",
     "local_input_monitor.h",
     "local_input_monitor_chromeos.cc",
     "local_input_monitor_mac.mm",
     "local_input_monitor_win.cc",
     "local_input_monitor_x11.cc",
     "logging.h",
@@ skipping 278 matching lines @@
     "host_extension_session_manager_unittest.cc",
     "host_power_save_blocker_unittest.cc",
     "host_status_logger_unittest.cc",
     "ipc_desktop_environment_unittest.cc",
     "it2me/it2me_confirmation_dialog_proxy_unittest.cc",
     "it2me/it2me_host_unittest.cc",
     "it2me/it2me_native_messaging_host_unittest.cc",
     "linux/audio_pipe_reader_unittest.cc",
     "linux/certificate_watcher_unittest.cc",
     "linux/unicode_to_keysym_unittest.cc",
+    "linux/x11_character_injector_unittest.cc",
     "linux/x_server_clipboard_unittest.cc",
     "local_input_monitor_unittest.cc",
     "mouse_cursor_monitor_proxy_unittest.cc",
     "mouse_shape_pump_unittest.cc",
     "native_messaging/native_messaging_reader_unittest.cc",
     "native_messaging/native_messaging_writer_unittest.cc",
     "pairing_registry_delegate_linux_unittest.cc",
     "pairing_registry_delegate_win_unittest.cc",
     "pin_hash_unittest.cc",
     "policy_watcher_unittest.cc",
@@ skipping 850 matching lines @@
         "mac/me2me_preference_pane_disable.xib",
 
         #"mac/me2me_preference_pane-Info.plist",
       ]
     }
   } else {
     group("remoting_me2me_host_archive") {
     }
   }
 }