Blink-side contiguous allocation of display items.

Source/platform/graphics/paint/ClipRecorder.cpp

Index: Source/platform/graphics/paint/ClipRecorder.cpp
diff --git a/Source/platform/graphics/paint/ClipRecorder.cpp b/Source/platform/graphics/paint/ClipRecorder.cpp
index 89471735da5e17201d0753c382e0102209552f18..d4fbcb1b3fbd37af0cb8f1467c71a7bdad80429e 100644
--- a/Source/platform/graphics/paint/ClipRecorder.cpp
+++ b/Source/platform/graphics/paint/ClipRecorder.cpp
@@ -12,7 +12,7 @@
 
 namespace blink {
 
-ClipRecorder::ClipRecorder(GraphicsContext& context, const DisplayItemClientWrapper& client, DisplayItem::Type type, const LayoutRect& clipRect, SkRegion::Op operation)
+ClipRecorder::ClipRecorder(GraphicsContext& context, const DisplayItemClientWrapper& client, DisplayItem::Type type, const LayoutRect& clipRect)
     : m_client(client)
     , m_context(context)
     , m_type(type)
@@ -21,9 +21,9 @@ ClipRecorder::ClipRecorder(GraphicsContext& context, const DisplayItemClientWrap
         ASSERT(m_context.displayItemList());
         if (m_context.displayItemList()->displayItemConstructionIsDisabled())
             return;
-        m_context.displayItemList()->add(ClipDisplayItem::create(m_client, type, pixelSnappedIntRect(clipRect), operation));
+        m_context.displayItemList()->createAndAppendIfNeeded<ClipDisplayItem>(m_client, type, pixelSnappedIntRect(clipRect));
     } else {
-        ClipDisplayItem clipDisplayItem(m_client, type, pixelSnappedIntRect(clipRect), operation);
+        ClipDisplayItem clipDisplayItem(m_client, type, pixelSnappedIntRect(clipRect));
         clipDisplayItem.replay(m_context);
     }
 }
@@ -35,7 +35,7 @@ ClipRecorder::~ClipRecorder()
         ASSERT(m_context.displayItemList());
         if (m_context.displayItemList()->displayItemConstructionIsDisabled())
             return;
-        m_context.displayItemList()->add(EndClipDisplayItem::create(m_client, endType));
+        m_context.displayItemList()->createAndAppendIfNeeded<EndClipDisplayItem>(m_client, endType);
     } else {
         EndClipDisplayItem endClipDisplayItem(m_client, endType);
         endClipDisplayItem.replay(m_context);