Revert "Move ViewDisplayList to GraphicsLayer"

Source/platform/graphics/paint/DisplayItem.cpp

Index: Source/platform/graphics/paint/DisplayItem.cpp
diff --git a/Source/platform/graphics/paint/DisplayItem.cpp b/Source/platform/graphics/paint/DisplayItem.cpp
deleted file mode 100644
index 145341d7b5af41137f1108d25c49de188edfca2e..0000000000000000000000000000000000000000
--- a/Source/platform/graphics/paint/DisplayItem.cpp
+++ /dev/null
@@ -1,55 +0,0 @@
-// 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/DisplayItem.h"
-
-namespace blink {
-
-#ifndef NDEBUG
-
-WTF::String DisplayItem::typeAsDebugString(DisplayItem::Type type)
-{
-    switch (type) {
-    case DisplayItem::DrawingPaintPhaseBlockBackground: return "DrawingPaintPhaseBlockBackground";
-    case DisplayItem::DrawingPaintPhaseChildBlockBackground: return "DrawingPaintPhaseChildBlockBackground";
-    case DisplayItem::DrawingPaintPhaseChildBlockBackgrounds: return "DrawingPaintPhaseChildBlockBackgrounds";
-    case DisplayItem::DrawingPaintPhaseFloat: return "DrawingPaintPhaseFloat";
-    case DisplayItem::DrawingPaintPhaseForeground: return "DrawingPaintPhaseForeground";
-    case DisplayItem::DrawingPaintPhaseOutline: return "DrawingPaintPhaseOutline";
-    case DisplayItem::DrawingPaintPhaseChildOutlines: return "DrawingPaintPhaseChildOutlines";
-    case DisplayItem::DrawingPaintPhaseSelfOutline: return "DrawingPaintPhaseSelfOutline";
-    case DisplayItem::DrawingPaintPhaseSelection: return "DrawingPaintPhaseSelection";
-    case DisplayItem::DrawingPaintPhaseCollapsedTableBorders: return "DrawingPaintPhaseCollapsedTableBorders";
-    case DisplayItem::DrawingPaintPhaseTextClip: return "DrawingPaintPhaseTextClip";
-    case DisplayItem::DrawingPaintPhaseMask: return "DrawingPaintPhaseMask";
-    case DisplayItem::DrawingPaintPhaseClippingMask: return "DrawingPaintPhaseClippingMask";
-    case DisplayItem::ClipLayerOverflowControls: return "ClipLayerOverflowControls";
-    case DisplayItem::ClipLayerBackground: return "ClipLayerBackground";
-    case DisplayItem::ClipLayerParent: return "ClipLayerParent";
-    case DisplayItem::ClipLayerFilter: return "ClipLayerFilter";
-    case DisplayItem::ClipLayerForeground: return "ClipLayerForeground";
-    case DisplayItem::ClipLayerFragmentFloat: return "ClipLayerFragmentFloat";
-    case DisplayItem::ClipLayerFragmentForeground: return "ClipLayerFragmentForeground";
-    case DisplayItem::ClipLayerFragmentChildOutline: return "ClipLayerFragmentChildOutline";
-    case DisplayItem::ClipLayerFragmentOutline: return "ClipLayerFragmentOutline";
-    case DisplayItem::ClipLayerFragmentMask: return "ClipLayerFragmentMask";
-    case DisplayItem::ClipLayerFragmentClippingMask: return "ClipLayerFragmentClippingMask";
-    case DisplayItem::ClipLayerFragmentParent: return "ClipLayerFragmentParent";
-    case DisplayItem::ClipLayerFragmentSelection: return "ClipLayerFragmentSelection";
-    case DisplayItem::ClipLayerFragmentChildBlockBackgrounds: return "ClipLayerFragmentChildBlockBackgrounds";
-    case DisplayItem::EndClip: return "EndClip";
-    }
-    ASSERT_NOT_REACHED();
-    return "Unknown";
-}
-
-WTF::String DisplayItem::asDebugString() const
-{
-    return String::format("{%s, type: \"%s\"}", clientDebugString().utf8().data(), typeAsDebugString(type()).utf8().data());
-}
-
-#endif
-
-} // namespace blink