Move cc::DisplayItemList and related classes into cc/paint/

cc/playback/filter_display_item.cc

-// Copyright 2014 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 "cc/playback/filter_display_item.h"
-
-namespace cc {
-
-FilterDisplayItem::FilterDisplayItem(const FilterOperations& filters,
-                                     const gfx::RectF& bounds,
-                                     const gfx::PointF& origin)
-    : DisplayItem(FILTER), filters(filters), bounds(bounds), origin(origin) {}
-
-FilterDisplayItem::~FilterDisplayItem() = default;
-
-EndFilterDisplayItem::EndFilterDisplayItem() : DisplayItem(END_FILTER) {}
-
-EndFilterDisplayItem::~EndFilterDisplayItem() = default;
-
-}  // namespace cc