[Views] Update ink drop for omnibox icons

ui/views/animation/ink_drop.h

Index: ui/views/animation/ink_drop.h
diff --git a/ui/views/animation/ink_drop.h b/ui/views/animation/ink_drop.h
index 0eb419e11105867f8c25447dee516146f55fd213..9980bb0ceea09e317699943c179d158949e8669a 100644
--- a/ui/views/animation/ink_drop.h
+++ b/ui/views/animation/ink_drop.h
@@ -13,6 +13,7 @@
 #include "ui/events/event_handler.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
+#include "ui/views/animation/ink_drop_observer.h"
 #include "ui/views/animation/ink_drop_state.h"
 #include "ui/views/view.h"
 #include "ui/views/views_export.h"
@@ -46,8 +47,17 @@ class VIEWS_EXPORT InkDrop {
   // Enables or disables the focus state.
   virtual void SetFocused(bool is_focused) = 0;
 
+  // Returns true if the highlight animation is in the process of fading in or
+  // is visible.
+  virtual bool IsHighlightFadingInOrVisible() const = 0;
+
+  // Sets the observer of this object.
+  void SetObserver(InkDropObserver* observer);
+
  protected:
-  InkDrop() {}
+  InkDrop() : observer_(nullptr) {}
+
+  InkDropObserver* observer_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(InkDrop);