Define accelerated steps time function.

ui/gfx/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")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
 }
@@ skipping 22 matching lines @@
     "android/shared_device_display_info.h",
     "android/view_configuration.cc",
     "android/view_configuration.h",
     "animation/animation.cc",
     "animation/animation.h",
     "animation/animation_container.cc",
     "animation/animation_container.h",
     "animation/animation_container_element.h",
     "animation/animation_container_observer.h",
     "animation/animation_delegate.h",
+    "animation/cubic_bezier.h",
+    "animation/cubic_bezier.cc",
     "animation/linear_animation.cc",
     "animation/linear_animation.h",
     "animation/multi_animation.cc",
     "animation/multi_animation.h",
     "animation/slide_animation.cc",
     "animation/slide_animation.h",
+    "animation/steps.cc",
+    "animation/steps.h",
     "animation/throb_animation.cc",
     "animation/throb_animation.h",
     "animation/tween.cc",
     "animation/tween.h",
     "blit.cc",
     "blit.h",
     "break_list.h",
     "canvas.cc",
     "canvas.h",
     "canvas_notimplemented.cc",
@@ skipping 335 matching lines @@
       "test/ui_cocoa_test_helper.mm",
     ]
   }
   if (is_linux) {
     configs += [ "//build/config/linux:fontconfig" ]
   }
 }
 
 test("gfx_unittests") {
   sources = [
+    "animation/cubic_bezier_unittest.cc",
+    "animation/steps_unittest.cc",
     "geometry/box_unittest.cc",
-    "geometry/cubic_bezier_unittest.cc",
     "geometry/insets_unittest.cc",
     "geometry/matrix3_unittest.cc",
     "geometry/point_unittest.cc",
     "geometry/point3_unittest.cc",
     "geometry/quad_unittest.cc",
     "geometry/rect_unittest.cc",
     "geometry/safe_integer_conversions_unittest.cc",
     "geometry/size_unittest.cc",
     "geometry/vector2d_unittest.cc",
     "geometry/vector3d_unittest.cc",
@@ skipping 28 matching lines @@
 if (is_android) {
   generate_jni("gfx_jni_headers") {
     sources = [
       "../android/java/src/org/chromium/ui/gfx/BitmapHelper.java",
       "../android/java/src/org/chromium/ui/gfx/DeviceDisplayInfo.java",
       "../android/java/src/org/chromium/ui/gfx/ViewConfigurationHelper.java",
     ]
     jni_package = "gfx"
   }
 }