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

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

Index: third_party/WebKit/Source/platform/graphics/paint/DisplayItemList.h
diff --git a/third_party/WebKit/Source/platform/graphics/paint/DisplayItemList.h b/third_party/WebKit/Source/platform/graphics/paint/DisplayItemList.h
index 6ebb963e7cb3c039a13a0bac6fb6bd32d29ccb4b..5f2183aa57c4af63f0891c00c64c191a810ecba7 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/DisplayItemList.h
+++ b/third_party/WebKit/Source/platform/graphics/paint/DisplayItemList.h
@@ -32,14 +32,12 @@ public:
     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;
     }
 
@@ -70,12 +68,7 @@ public:
     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