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

third_party/WebKit/Source/platform/graphics/paint/DisplayItemList.h

 // 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.
 
 #ifndef DisplayItemList_h
 #define DisplayItemList_h
 
 #include "platform/graphics/ContiguousContainer.h"
 #include "platform/graphics/paint/DisplayItem.h"
 #include "platform/graphics/paint/Transform3DDisplayItem.h"
@@ skipping 14 matching lines @@
 static const size_t kMaximumDisplayItemSize = sizeof(BeginTransform3DDisplayItem);
 
 // A container for a list of display items.
 class PLATFORM_EXPORT DisplayItemList : public ContiguousContainer<DisplayItem, kDisplayItemAlignment> {
 public:
     DisplayItemList(size_t initialSizeBytes)
         : ContiguousContainer(kMaximumDisplayItemSize, initialSizeBytes) {}
     DisplayItemList(DisplayItemList&& source)
         : ContiguousContainer(std::move(source))
         , m_visualRects(std::move(source.m_visualRects))
-        , m_beginItemIndices(std::move(source.m_beginItemIndices))
     {}
 
     DisplayItemList& operator=(DisplayItemList&& source)
     {
         ContiguousContainer::operator=(std::move(source));
         m_visualRects = std::move(source.m_visualRects);
-        m_beginItemIndices = std::move(source.m_beginItemIndices);
         return *this;
     }
 
     DisplayItem& appendByMoving(DisplayItem&);
 
     bool hasVisualRect(size_t index) const { return index < m_visualRects.size(); }
     IntRect visualRect(size_t index) const
     {
         DCHECK(hasVisualRect(index));
         return m_visualRects[index];
@@ skipping 10 matching lines @@
         Iterator begin() const { return m_begin; }
         Iterator end() const { return m_end; }
     private:
         Iterator m_begin;
         Iterator m_end;
     };
     Range<iterator> itemsInPaintChunk(const PaintChunk&);
     Range<const_iterator> itemsInPaintChunk(const PaintChunk&) const;
 
 private:
-    // If we're currently within a paired display item block, unions the
-    // given visual rect with the begin display item's visual rect.
-    void growCurrentBeginItemVisualRect(const IntRect& visualRect);
-
     Vector<IntRect> m_visualRects;
-    Vector<size_t> m_beginItemIndices;
 };
 
 } // namespace blink
 
 #endif // DisplayItemList_h