Blink-side contiguous allocation of display items.

Source/core/paint/SVGMaskPainter.cpp

Index: Source/core/paint/SVGMaskPainter.cpp
diff --git a/Source/core/paint/SVGMaskPainter.cpp b/Source/core/paint/SVGMaskPainter.cpp
index 0096a38592c90d0bde4feede2c2b96d16fcb42b6..3bde83583ec19977bac53bd8510fb0a0a6c31980 100644
--- a/Source/core/paint/SVGMaskPainter.cpp
+++ b/Source/core/paint/SVGMaskPainter.cpp
@@ -32,7 +32,7 @@ bool SVGMaskPainter::prepareEffect(const LayoutObject& object, GraphicsContext*
         ASSERT(context->displayItemList());
         if (context->displayItemList()->displayItemConstructionIsDisabled())
             return true;
-        context->displayItemList()->add(BeginCompositingDisplayItem::create(object, SkXfermode::kSrcOver_Mode, 1, &paintInvalidationRect));
+        context->displayItemList()->createAndAppend<BeginCompositingDisplayItem>(object, SkXfermode::kSrcOver_Mode, 1, &paintInvalidationRect);
     } else {
         BeginCompositingDisplayItem beginCompositingContent(object, SkXfermode::kSrcOver_Mode, 1, &paintInvalidationRect);
         beginCompositingContent.replay(*context);
@@ -61,7 +61,7 @@ void SVGMaskPainter::finishEffect(const LayoutObject& object, GraphicsContext* c
             if (context->displayItemList()->lastDisplayItemIsNoopBegin())
                 context->displayItemList()->removeLastDisplayItem();
             else
-                context->displayItemList()->add(EndCompositingDisplayItem::create(object));
+                context->displayItemList()->createAndAppend<EndCompositingDisplayItem>(object);
         }
     } else {
         EndCompositingDisplayItem endCompositingContent(object);