Update voice interaction burst animation

ash/shelf/voice_interaction_overlay.h

Index: ash/shelf/voice_interaction_overlay.h
diff --git a/ash/shelf/voice_interaction_overlay.h b/ash/shelf/voice_interaction_overlay.h
index 304eba11ebfd4478c3a44cb0d032861c727bcb6f..ec30cf2cfc41384caf1c3ffd35ebe2b71ef1fa52 100644
--- a/ash/shelf/voice_interaction_overlay.h
+++ b/ash/shelf/voice_interaction_overlay.h
@@ -13,23 +13,33 @@
 #include "ui/views/animation/ink_drop_painted_layer_delegates.h"
 #include "ui/views/view.h"
 
+namespace ui {
+class CallbackLayerAnimationObserver;
+}  // namespace ui
+
 namespace ash {
 
 class AppListButton;
+class VoiceInteractionIconBackground;
 
 class ASH_EXPORT VoiceInteractionOverlay : public views::View {
  public:
   explicit VoiceInteractionOverlay(AppListButton* host_view);
   ~VoiceInteractionOverlay() override;
 
-  void StartAnimation();
+  void StartAnimation(bool show_icon);
   void EndAnimation();
   void BurstAnimation();
+  void HideAnimation();
+  bool IsBursting() const { return is_bursting_; }

[oshima, 2017/07/06 22:04:42]

is_bursting() const

 
  private:
+  bool AnimationEndedCallback(
+      const ui::CallbackLayerAnimationObserver& observer);
+
   std::unique_ptr<ui::Layer> ripple_layer_;
   std::unique_ptr<ui::Layer> icon_layer_;
-  std::unique_ptr<ui::Layer> background_layer_;
+  std::unique_ptr<VoiceInteractionIconBackground> background_layer_;
 
   AppListButton* host_view_;
 
@@ -37,6 +47,10 @@ class ASH_EXPORT VoiceInteractionOverlay : public views::View {
   // turning back.
   bool is_bursting_;
 
+  bool show_icon_;
+
+  bool should_hide_animation_;

[oshima, 2017/07/06 22:04:42]

can you document this? 

+
   views::CircleLayerDelegate circle_layer_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(VoiceInteractionOverlay);