Revert of Remove cullRect() from PaintOpBuffer.

third_party/WebKit/Source/platform/graphics/paint/PaintArtifact.cpp

 // 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 "platform/graphics/paint/PaintArtifact.h"
 
 #include "cc/paint/display_item_list.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/compositing/PaintChunksToCcLayer.h"
@@ skipping 10 matching lines @@
 void ComputeChunkBoundsAndOpaqueness(const DisplayItemList& display_items,
                                      Vector<PaintChunk>& paint_chunks) {
   for (PaintChunk& chunk : paint_chunks) {
     FloatRect bounds;
     SkRegion known_to_be_opaque_region;
     for (const DisplayItem& item : display_items.ItemsInPaintChunk(chunk)) {
       bounds.Unite(FloatRect(item.Client().VisualRect()));
       if (!item.IsDrawing())
         continue;
       const auto& drawing = static_cast<const DrawingDisplayItem&>(item);
-      if (drawing.GetPaintRecord() && drawing.KnownToBeOpaque()) {
-        // TODO(pdr): It may be too conservative to round in to the
-        // EnclosedIntRect.
-        SkIRect conservative_rounded_rect;
-        const SkRect& record_bounds = drawing.GetPaintRecordBounds();
-        record_bounds.roundIn(&conservative_rounded_rect);
-        known_to_be_opaque_region.op(conservative_rounded_rect,
-                                     SkRegion::kUnion_Op);
+      if (const PaintRecord* record = drawing.GetPaintRecord().get()) {
+        if (drawing.KnownToBeOpaque()) {
+          // TODO(pdr): It may be too conservative to round in to the
+          // enclosedIntRect.
+          SkIRect conservative_rounded_rect;
+          const SkRect& cull_rect = record->cullRect();
+          cull_rect.roundIn(&conservative_rounded_rect);
+          known_to_be_opaque_region.op(conservative_rounded_rect,
+                                       SkRegion::kUnion_Op);
+        }
       }
     }
     chunk.bounds = bounds;
     if (known_to_be_opaque_region.contains(EnclosingIntRect(bounds)))
       chunk.known_to_be_opaque = true;
   }
 }
 
 }  // namespace
 
@@ skipping 71 matching lines @@
   size_t visual_rect_index = 0;
   for (const DisplayItem& display_item : display_item_list_) {
     display_item.AppendToWebDisplayItemList(
         display_item_list_.VisualRect(visual_rect_index), list);
     visual_rect_index++;
   }
   list->SetIsSuitableForGpuRasterization(IsSuitableForGpuRasterization());
 }
 
 }  // namespace blink