ash: Refactor autoclick common code to ash/autoclick/common.

ash/autoclick/common/BUILD.gn

 # Copyright 2016 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/ui.gni")
 
-component("touch_hud") {
+source_set("autoclick") {
   sources = [
-    "ash_touch_hud_export.h",
-    "touch_hud_renderer.cc",
-    "touch_hud_renderer.h",
+    "autoclick_controller_common.cc",
+    "autoclick_controller_common.h",
+    "autoclick_controller_common_delegate.h",
+    "autoclick_ring_handler.cc",
+    "autoclick_ring_handler.h",
   ]
 
-  defines = [ "ASH_TOUCH_HUD_IMPLEMENTATION" ]
-
   deps = [
     "//base",
     "//skia",
+    "//ui/aura",
     "//ui/compositor",
+    "//ui/display",
     "//ui/events",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/views",
+    "//ui/wm",
   ]
 }