Moved ButtonInkDropDelegate logic into InkDropHostView and deleted InkDropDelegates.

ui/views/animation/test/ink_drop_host_view_test_api.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/test/ink_drop_host_view_test_api.h"
+
+namespace views {
+namespace test {
+
+InkDropHostViewTestApi::InkDropHostViewTestApi(InkDropHostView* host_view)
+    : host_view_(host_view) {}
+
+InkDropHostViewTestApi::~InkDropHostViewTestApi() {}
+
+void InkDropHostViewTestApi::SetInkDrop(std::unique_ptr<InkDrop> ink_drop) {
+  host_view_->SetHasInkDrop(true);
+  host_view_->ink_drop_ = std::move(ink_drop);
+}
+
+}  // namespace test
+}  // namespace views