Implemented prototype for new ink drop specs.

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 d88f022fbe0c60ce466e3fb676129e1ea51f54ee..4ab36df3354bee3cb33b9cce34d6633e4d751777 100644
--- a/ui/views/animation/ink_drop_state.h
+++ b/ui/views/animation/ink_drop_state.h
@@ -8,6 +8,9 @@
 namespace views {
 
 // The different states that the ink drop animation can be animated to.
+//
+// Note: The order of this matters for some constant look up arrays. (e.g.
+// kAnimationDurationsMs in ink_drop_animation.cc)
 enum class InkDropState {
   // The ink drop is not visible.
   HIDDEN,
@@ -17,12 +20,20 @@ enum class InkDropState {
   // The quick action for the view has been triggered. e.g. A tap gesture to
   // click a button.
   QUICK_ACTION,
-  // The slow action for the view has been triggered. e.g. A long press to bring
-  // up a menu.
+  // A view is being interacted with and the pending action will be a 'slow'
+  // action. e.g. A long press that is still active before releasing.
+  SLOW_ACTION_PENDING,
+  // The slow action for the view has been triggered. e.g. A long press release
+  // to bring up a menu.
   SLOW_ACTION,
-  // An active state for a view that is no longer being interacted with. e.g. A
-  // pressed button that is showing a menu.
-  ACTIVATED
+  // An active state for a view that is not currently being interacted with.
+  // e.g. A pressed button that is showing a menu.
+  ACTIVATED,
+  // A previously active state has been toggled to inactive. e.g. A drop down
+  // menu is closed.
+  DEACTIVATED,
+  // Number of ink drop states. NOT an actual ink drop state.
+  COUNT,
 };
 
 }  // namespace views