[Reland] Correct fixed-position recording for Slimming Paint

Source/platform/graphics/paint/FixedPositionDisplayItem.cpp

Index: Source/platform/graphics/paint/FixedPositionDisplayItem.cpp
diff --git a/Source/platform/graphics/paint/FixedPositionDisplayItem.cpp b/Source/platform/graphics/paint/FixedPositionDisplayItem.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..cf19006ebcba883f51c1053e5c7e9f6d8173f5ce
--- /dev/null
+++ b/Source/platform/graphics/paint/FixedPositionDisplayItem.cpp
@@ -0,0 +1,24 @@
+// 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/FixedPositionDisplayItem.h"
+
+#include "platform/graphics/GraphicsContext.h"
+#include "platform/transforms/AffineTransform.h"
+#include "public/platform/WebDisplayItemList.h"
+
+namespace blink {
+
+void BeginFixedPositionDisplayItem::appendToWebDisplayItemList(WebDisplayItemList* list) const
+{
+    // TODO(trchen): Should implement the compositor counterpart and update transform tree algorithm.
+}
+
+void EndFixedPositionDisplayItem::appendToWebDisplayItemList(WebDisplayItemList* list) const
+{
+    // TODO(trchen): Should implement the compositor counterpart and update transform tree algorithm.
+}
+
+} // namespace blink