Enhanced the InkDropRippleImpl to create/destroy InkDropAnimations as needed.

ui/views/animation/ink_drop_state.h

Index: ui/views/animation/ink_drop_state.h
diff --git a/ui/views/animation/ink_drop_state.h b/ui/views/animation/ink_drop_state.h
index 2e8cd8676b09d7761bfa7160cda771b00058a6c9..1526a43a9a0c51580156f48f68b80af9a1143c38 100644
--- a/ui/views/animation/ink_drop_state.h
+++ b/ui/views/animation/ink_drop_state.h
@@ -5,6 +5,10 @@
 #ifndef UI_VIEWS_ANIMATION_INK_DROP_STATE_H_
 #define UI_VIEWS_ANIMATION_INK_DROP_STATE_H_
 
+#include <iosfwd>
+
+#include "ui/views/views_export.h"
+
 namespace views {
 
 // The different states that the ink drop animation can be animated to.
@@ -31,6 +35,8 @@ enum class InkDropState {
   DEACTIVATED,
 };
 
+VIEWS_EXPORT std::ostream& operator<<(std::ostream& out, InkDropState state);
+
 }  // namespace views
 
 #endif  // UI_VIEWS_ANIMATION_INK_DROP_STATE_H_