Use a bitfield to store animatable properties.

ui/app_list/views/pulsing_block_view.cc

Index: ui/app_list/views/pulsing_block_view.cc
diff --git a/ui/app_list/views/pulsing_block_view.cc b/ui/app_list/views/pulsing_block_view.cc
index aa2c2733a33595535b9d82b5f9bfe42d50719040..373ceefdce6d1ff5dcfb4d48eced901890699dec 100644
--- a/ui/app_list/views/pulsing_block_view.cc
+++ b/ui/app_list/views/pulsing_block_view.cc
@@ -50,18 +50,14 @@ void SchedulePulsingAnimation(ui::Layer* layer) {
             base::TimeDelta::FromMilliseconds(kAnimationDurationInMs)));
   }
 
-  ui::LayerAnimationElement::AnimatableProperties opacity_properties;
-  opacity_properties.insert(ui::LayerAnimationElement::OPACITY);
   opacity_sequence->AddElement(
       ui::LayerAnimationElement::CreatePauseElement(
-          opacity_properties,
-           base::TimeDelta::FromMilliseconds(kAnimationDurationInMs)));
+          ui::LayerAnimationElement::OPACITY,
+          base::TimeDelta::FromMilliseconds(kAnimationDurationInMs)));
 
-  ui::LayerAnimationElement::AnimatableProperties transform_properties;
-  transform_properties.insert(ui::LayerAnimationElement::TRANSFORM);
   transform_sequence->AddElement(
       ui::LayerAnimationElement::CreatePauseElement(
-          transform_properties,
+          ui::LayerAnimationElement::TRANSFORM,
           base::TimeDelta::FromMilliseconds(kAnimationDurationInMs)));
 
   std::vector<ui::LayerAnimationSequence*> animations;