Add support for animations in vector icons.

ash/resources/vector_icons/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("//ui/vector_icons/vector_icons.gni")
 
 aggregate_vector_icons("ash_vector_icons") {
   icon_directory = "."
 
   icons = [
@@ skipping 228 matching lines @@
     "window_control_minimize.icon",
     "window_control_restore.1x.icon",
     "window_control_restore.icon",
     "window_control_right_snapped.1x.icon",
     "window_control_right_snapped.icon",
   ]
 }
 
 source_set("vector_icons") {
   sources = get_target_outputs(":ash_vector_icons")
-  sources += [ "//ui/gfx/vector_icon_types.h" ]
 
   deps = [
     ":ash_vector_icons",
     "//base",
     "//skia",
+    "//ui/gfx",
   ]
 }