Move TouchTransformerController to ui/display/.

ash/BUILD.gn

Index: ash/BUILD.gn
diff --git a/ash/BUILD.gn b/ash/BUILD.gn
index 06f3ffc304e0c48047667a22125e73df1bc0b79b..6f7f9b58d17962c8f94e82309d87d7874edc2e8c 100644
--- a/ash/BUILD.gn
+++ b/ash/BUILD.gn
@@ -754,14 +754,14 @@ component("ash") {
     "system/chromeos/rotation/tray_rotation_lock.h",
     "system/chromeos/screen_layout_observer.cc",
     "system/chromeos/screen_layout_observer.h",
+    "touch/ash_touch_transform_controller.cc",
+    "touch/ash_touch_transform_controller.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.h",
     "touch/touch_uma.cc",
     "touch/touch_uma.h",
     "utility/screenshot_controller.cc",
@@ -1284,7 +1284,6 @@ test("ash_unittests") {
     "test/ash_unittests.cc",
     "tooltips/tooltip_controller_unittest.cc",
     "touch/touch_observer_hud_unittest.cc",
-    "touch/touch_transformer_controller_unittest.cc",
     "utility/screenshot_controller_unittest.cc",
     "virtual_keyboard_controller_unittest.cc",
     "wm/always_on_top_controller_unittest.cc",