Use a bitfield to store animatable properties.

ui/app_list/views/pulsing_block_view.cc

 // Copyright (c) 2012 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.
 
 #include "ui/app_list/views/pulsing_block_view.h"
 
 #include <vector>
 
 #include "base/rand_util.h"
 #include "third_party/skia/include/core/SkColor.h"
@@ skipping 32 matching lines @@
         ui::LayerAnimationElement::CreateOpacityElement(
             kAnimationOpacity[i],
             base::TimeDelta::FromMilliseconds(kAnimationDurationInMs)));
     transform_sequence->AddElement(
         ui::LayerAnimationElement::CreateTransformElement(
             gfx::GetScaleTransform(local_bounds.CenterPoint(),
                                    kAnimationScale[i]),
             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;
   animations.push_back(opacity_sequence.release());
   animations.push_back(transform_sequence.release());
   layer->GetAnimator()->ScheduleTogether(animations);
 }
 
 }  // namespace
 
@@ skipping 22 matching lines @@
   SchedulePulsingAnimation(layer());
 }
 
 void PulsingBlockView::OnPaint(gfx::Canvas* canvas) {
   gfx::Rect rect(GetContentsBounds());
   rect.ClampToCenteredSize(gfx::Size(kBlockSize, kBlockSize));
   canvas->FillRect(rect, kBlockColor);
 }
 
 }  // namespace app_list