[WIP][Ozone] Support external touchscreens

ash/ash.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'chromium_code': 1,
     'grit_out_dir': '<(SHARED_INTERMEDIATE_DIR)/chrome',
     # These files lists are shared with the GN build.
     'ash_sources': [
@@ skipping 459 matching lines @@
       'system/win/audio/tray_audio_delegate_win.cc',
       'system/win/audio/tray_audio_delegate_win.h',
       'system/win/audio/tray_audio_win.cc',
       'system/win/audio/tray_audio_win.h',
       'touch/touch_hud_debug.cc',
       'touch/touch_hud_debug.h',
       'touch/touch_hud_projection.cc',
       'touch/touch_hud_projection.h',
       'touch/touch_observer_hud.cc',
       'touch/touch_observer_hud.h',
-      'touch/touch_transformer_controller.cc',
+      'touch/touch_transformer_controller_ozone.cc',
+      'touch/touch_transformer_controller_x11.cc',
       'touch/touch_transformer_controller.h',
       'touch/touch_uma.cc',
       'touch/touch_uma.h',
       'touch/touchscreen_util.cc',
       'touch/touchscreen_util.h',
       'virtual_keyboard_controller.cc',
       'virtual_keyboard_controller.h',
       'volume_control_delegate.h',
       'wm/app_list_controller.cc',
       'wm/app_list_controller.h',
@@ skipping 453 matching lines @@
         }],
         ['use_x11!=1', {
           'sources!': [
             # Note: sources list duplicated in GN build.
             'accelerators/key_hold_detector.cc',
             'accelerators/key_hold_detector.h',
             'accelerators/magnifier_key_scroller.cc',
             'accelerators/magnifier_key_scroller.h',
             'accelerators/spoken_feedback_toggler.cc',
             'accelerators/spoken_feedback_toggler.h',
-            'touch/touch_transformer_controller.cc',
-            'touch/touch_transformer_controller.h',
           ],
         }, { # else: use_x11==1
           'dependencies': [
             '../build/linux/system.gyp:xfixes',
            ],
         }],
         ['chromeos==1', {
           'dependencies': [
             '../chromeos/chromeos.gyp:chromeos',
             # Ash #includes power_supply_properties.pb.h directly.
@@ skipping 326 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'ash_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }