Move ViewDisplayList to GraphicsLayer

Source/platform/graphics/paint/DisplayItemList.h

+// 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.
+
+#ifndef DisplayItemList_h
+#define DisplayItemList_h
+
+#include "platform/PlatformExport.h"
+#include "platform/graphics/paint/DisplayItem.h"
+#include "wtf/HashSet.h"
+#include "wtf/PassOwnPtr.h"
+#include "wtf/Vector.h"
+
+namespace blink {
+
+typedef Vector<OwnPtr<DisplayItem> > PaintList;
+
+class PLATFORM_EXPORT DisplayItemList {
+    WTF_MAKE_NONCOPYABLE(DisplayItemList);
+public:
+    DisplayItemList() { };
+
+    const PaintList& paintList();
+    void add(WTF::PassOwnPtr<DisplayItem>);
+    void invalidate(DisplayItemClient);
+
+#ifndef NDEBUG
+    void showDebugData() const;
+#endif
+
+private:
+    PaintList::iterator findDisplayItem(PaintList::iterator, const DisplayItem&);
+    bool wasInvalidated(const DisplayItem&) const;
+    void updatePaintList();
+
+    PaintList m_paintList;
+    HashSet<DisplayItemClient> m_paintListRenderers;
+    HashSet<DisplayItemClient> m_invalidated;
+    PaintList m_newPaints;
+};
+
+} // namespace blink
+
+#endif // DisplayItemList_h