Moved ButtonInkDropDelegate logic into InkDropHostView and deleted InkDropDelegates.

ui/views/animation/ink_drop_stub.cc

+// 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 "ui/views/animation/ink_drop_stub.h"
+
+namespace views {
+
+InkDropStub::InkDropStub() {}
+
+InkDropStub::~InkDropStub() {}
+
+InkDropState InkDropStub::GetTargetInkDropState() const {
+  return InkDropState::HIDDEN;
+}
+
+void InkDropStub::AnimateToState(InkDropState state) {}
+
+void InkDropStub::SnapToActivated() {}
+
+void InkDropStub::SetHovered(bool is_hovered) {}
+
+void InkDropStub::SetFocused(bool is_hovered) {}
+
+}  // namespace views