[Views] Update ink drop for omnibox icons

ui/views/animation/ink_drop_observer.h

Index: ui/views/animation/ink_drop_observer.h
diff --git a/ui/views/animation/ink_drop_observer.h b/ui/views/animation/ink_drop_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..b08ab5b728450e1c8d0924994612bf9d83ce2b76
--- /dev/null
+++ b/ui/views/animation/ink_drop_observer.h
@@ -0,0 +1,33 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_VIEWS_ANIMATION_INK_DROP_OBSERVER_H_
+#define UI_VIEWS_ANIMATION_INK_DROP_OBSERVER_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "ui/views/animation/ink_drop_animation_ended_reason.h"
+#include "ui/views/animation/ink_drop_state.h"
+#include "ui/views/views_export.h"
+
+namespace views {
+
+// Observer to attach to an InkDropRipple.
+class VIEWS_EXPORT InkDropObserver {
+ public:
+  // Called when the animation of the current InkDrop has started.
+  virtual void AnimationStarted() = 0;

[bruthig, 2017/03/14 03:49:44]

nit: AnimationStarted() is very generic and there is a risk of a naming conflict
by inheriting classes.  InkDropAnimationStarted() would probably be a specific
enough name to avoid this.

[spqchan, 2017/03/21 18:25:23]

Done.

+
+ protected:
+  InkDropObserver() = default;
+  virtual ~InkDropObserver() = default;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(InkDropObserver);
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_ANIMATION_INK_DROP_OBSERVER_H_