Move visual rect unioning between paired items to cc::DisplayItemList.

ui/compositor/paint_recorder.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 "ui/compositor/paint_recorder.h"
 
 #include "cc/playback/display_item_list.h"
 #include "cc/playback/drawing_display_item.h"
 #include "third_party/skia/include/core/SkPictureRecorder.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
@@ skipping 24 matching lines @@
 PaintRecorder::PaintRecorder(const PaintContext& context,
                              const gfx::Size& recording_size)
     : PaintRecorder(context, recording_size, nullptr) {
 }
 
 PaintRecorder::~PaintRecorder() {
 #if DCHECK_IS_ON()
   context_.inside_paint_recorder_ = false;
 #endif
   const auto& item =
-      context_.list_->CreateAndAppendItem<cc::DrawingDisplayItem>(
-          bounds_in_layer_,
-          context_.recorder_->finishRecordingAsPicture());
+      context_.list_->CreateAndAppendDrawingItem<cc::DrawingDisplayItem>(
+          bounds_in_layer_, context_.recorder_->finishRecordingAsPicture());
   if (cache_)
     cache_->SetCache(item);
 }
 
 }  // namespace ui