Revert "Move ViewDisplayList to GraphicsLayer"

Source/core/rendering/PaintPhase.cpp

Index: Source/core/rendering/PaintPhase.cpp
diff --git a/Source/core/rendering/PaintPhase.cpp b/Source/core/rendering/PaintPhase.cpp
deleted file mode 100644
index b24895aa3de4cae0ed9dbcdb71d8604cdf27f9dd..0000000000000000000000000000000000000000
--- a/Source/core/rendering/PaintPhase.cpp
+++ /dev/null
@@ -1,17 +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 "core/rendering/PaintPhase.h"
-
-#include "platform/graphics/paint/DisplayItem.h"
-#include "wtf/Assertions.h"
-
-namespace blink {
-
-// DisplayItem types must be kept in sync with PaintPhase.
-COMPILE_ASSERT((unsigned)DisplayItem::DrawingPaintPhaseBlockBackground == (unsigned)PaintPhaseBlockBackground, DisplayItem_Type_should_stay_in_sync);
-COMPILE_ASSERT((unsigned)DisplayItem::DrawingPaintPhaseClippingMask == (unsigned)PaintPhaseClippingMask, DisplayItem_Type_should_stay_in_sync);
-
-} // namespace blink