Moved ButtonInkDropDelegate logic into InkDropHostView and deleted InkDropDelegates.

ui/views/animation/ink_drop_stub.h

Index: ui/views/animation/ink_drop_stub.h
diff --git a/ui/views/animation/ink_drop_stub.h b/ui/views/animation/ink_drop_stub.h
new file mode 100644
index 0000000000000000000000000000000000000000..c3efc8dcef9f24d8c4231de09d8c0ac0513effce
--- /dev/null
+++ b/ui/views/animation/ink_drop_stub.h
@@ -0,0 +1,28 @@
+// Copyright 2016 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.
+
+#include "base/macros.h"
+#include "ui/views/animation/ink_drop.h"
+
+namespace views {
+
+// A stub implementation of an InkDrop that can be used when no visuals should
+// be shown. e.g. material design is enabled.
+class InkDropStub : public InkDrop {
+ public:
+  InkDropStub();
+  ~InkDropStub() override;
+
+  // InkDrop:
+  InkDropState GetTargetInkDropState() const override;
+  void AnimateToState(InkDropState state) override;
+  void SnapToActivated() override;
+  void SetHovered(bool is_hovered) override;
+  void SetFocused(bool is_hovered) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(InkDropStub);
+};
+
+}  // namespace views