WIP for display item list backed by ListContainer

Source/platform/graphics/paint/DisplayItemListTest.cpp

 // Copyright 2014 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 "config.h"
 #include "platform/graphics/paint/DisplayItemList.h"
 
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/paint/ClipPathRecorder.h"
@@ skipping 39 matching lines @@
 
     DisplayItemClient displayItemClient() const { return toDisplayItemClient(this); }
     String debugName() const { return m_name; }
 
 private:
     String m_name;
 };
 
 class TestDisplayItem : public DisplayItem {
 public:
-    TestDisplayItem(const DisplayItemClientWrapper& client, Type type) : DisplayItem(client, type) { }
+    TestDisplayItem(TestDisplayItemClient& client, Type type)
+    {
+        DisplayItemClientWrapper clientWrapper(client);
+        setClientAndType(clientWrapper, type);
+    }
 
     virtual void replay(GraphicsContext&) override final { ASSERT_NOT_REACHED(); }
     virtual void appendToWebDisplayItemList(WebDisplayItemList*) const override final { ASSERT_NOT_REACHED(); }
 };
 
 #ifndef NDEBUG
 #define TRACE_DISPLAY_ITEMS(i, expected, actual) \
     String trace = String::format("%d: ", (int)i) + "Expected: " + (expected).asDebugString() + " Actual: " + (actual).asDebugString(); \
     SCOPED_TRACE(trace.utf8().data());
 #else
@@ skipping 624 matching lines @@
     drawRect(context, third, backgroundDrawingType, FloatRect(0, 0, 100, 100));
     displayItemList().commitNewDisplayItems();
 
     // Empty clips should have been optimized out.
     EXPECT_DISPLAY_LIST(displayItemList().displayItems(), 2,
         TestDisplayItem(first, backgroundDrawingType),
         TestDisplayItem(third, backgroundDrawingType));
 }
 
 } // namespace blink