CC Animation: Make cc/animation an independent GN component.

ui/compositor/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/config/ui.gni")
 import("//testing/test.gni")
 
 component("compositor") {
   sources = [
     "callback_layer_animation_observer.cc",
@@ skipping 60 matching lines @@
     "transform_recorder.cc",
     "transform_recorder.h",
   ]
 
   defines = [ "COMPOSITOR_IMPLEMENTATION" ]
 
   deps = [
     "//base",
     "//base/third_party/dynamic_annotations",
     "//cc",
+    "//cc/animation",
     "//cc/surfaces",
     "//cc/surfaces:surface_id",
     "//gpu/command_buffer/common",
     "//skia",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 
   if (is_win && use_aura) {
@@ skipping 107 matching lines @@
     "//ui/base",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
     "//ui/resources",
   ]
   if (is_linux) {
     deps += [ "//third_party/mesa:osmesa" ]
   }
 }