Enhanced the InkDropRippleImpl to create/destroy InkDropAnimations as needed.

ui/views/animation/ink_drop_animation_unittest.cc

Index: ui/views/animation/ink_drop_animation_unittest.cc
diff --git a/ui/views/animation/ink_drop_animation_unittest.cc b/ui/views/animation/ink_drop_animation_unittest.cc
index 68617ce6ae91d3cd8e67f00c24ce1f1eecc13c10..91f8143416a80a857972acd1a1917719b6d7f0bd 100644
--- a/ui/views/animation/ink_drop_animation_unittest.cc
+++ b/ui/views/animation/ink_drop_animation_unittest.cc
@@ -63,7 +63,8 @@ TEST_F(InkDropAnimationTest, AnimateToActionPending) {
 TEST_F(InkDropAnimationTest, AnimateToQuickAction) {
   scoped_ptr<InkDropAnimation> ink_drop_animation = CreateInkDropAnimation();
   ink_drop_animation->AnimateToState(views::InkDropState::QUICK_ACTION);
-  EXPECT_EQ(views::InkDropState::HIDDEN, ink_drop_animation->ink_drop_state());
+  EXPECT_EQ(views::InkDropState::QUICK_ACTION,
+            ink_drop_animation->ink_drop_state());
 }
 
 TEST_F(InkDropAnimationTest, AnimateToSlowActionPending) {
@@ -76,7 +77,8 @@ TEST_F(InkDropAnimationTest, AnimateToSlowActionPending) {
 TEST_F(InkDropAnimationTest, AnimateToSlowAction) {
   scoped_ptr<InkDropAnimation> ink_drop_animation = CreateInkDropAnimation();
   ink_drop_animation->AnimateToState(views::InkDropState::SLOW_ACTION);
-  EXPECT_EQ(views::InkDropState::HIDDEN, ink_drop_animation->ink_drop_state());
+  EXPECT_EQ(views::InkDropState::SLOW_ACTION,
+            ink_drop_animation->ink_drop_state());
 }
 
 TEST_F(InkDropAnimationTest, AnimateToActivated) {
@@ -89,7 +91,8 @@ TEST_F(InkDropAnimationTest, AnimateToActivated) {
 TEST_F(InkDropAnimationTest, AnimateToDeactivated) {
   scoped_ptr<InkDropAnimation> ink_drop_animation = CreateInkDropAnimation();
   ink_drop_animation->AnimateToState(views::InkDropState::DEACTIVATED);
-  EXPECT_EQ(views::InkDropState::HIDDEN, ink_drop_animation->ink_drop_state());
+  EXPECT_EQ(views::InkDropState::DEACTIVATED,
+            ink_drop_animation->ink_drop_state());
 }
 
 TEST_F(InkDropAnimationTest,