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

cc/layers/picture_image_layer_unittest.cc

 // Copyright 2015 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/layers/picture_image_layer.h"
 
 #include "cc/animation/animation_host.h"
-#include "cc/playback/display_item.h"
+#include "cc/paint/display_item.h"
 #include "cc/test/fake_layer_tree_host.h"
 #include "cc/test/skia_common.h"
 #include "cc/test/test_task_graph_runner.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "third_party/skia/include/core/SkImage.h"
 #include "third_party/skia/include/core/SkSurface.h"
 
 namespace cc {
@@ skipping 30 matching lines @@
   unsigned char actual_pixels[4 * 200 * 200] = {0};
   DrawDisplayList(actual_pixels, layer_rect, display_list);
 
   EXPECT_EQ(0, memcmp(actual_pixels, image_pixels, 4 * 200 * 200));
 
   layer->SetLayerTreeHost(nullptr);
 }
 
 }  // namespace
 }  // namespace cc