[Slimming Paint] Blink-side contiguous allocation of display items.

Source/platform/graphics/paint/CachedDisplayItem.cpp

Index: Source/platform/graphics/paint/CachedDisplayItem.cpp
diff --git a/Source/platform/graphics/paint/CachedDisplayItem.cpp b/Source/platform/graphics/paint/CachedDisplayItem.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..e1573a2bc504a9d128126facec4c72e385dd83e9
--- /dev/null
+++ b/Source/platform/graphics/paint/CachedDisplayItem.cpp
@@ -0,0 +1,18 @@
+// 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.
+
+#include "config.h"
+#include "platform/graphics/paint/CachedDisplayItem.h"
+
+#include "platform/graphics/paint/DisplayItems.h"
+
+namespace blink {
+
+void CachedDisplayItem::appendByMoving(DisplayItems& destination)
+{
+    destination.emplaceBack<CachedDisplayItem>(
+        DisplayItemClientWrapperHelper(*this), type());
+}
+
+} // namespace blink