Move cc::DisplayItemList and related classes into cc/paint/

cc/trees/element_id.h

 // Copyright 2016 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 CC_TREES_ELEMENT_ID_H_
 #define CC_TREES_ELEMENT_ID_H_
 
 #include <stddef.h>
 
 #include <cstdint>
 #include <functional>
 #include <iosfwd>
 #include <memory>
 
 #include "base/hash.h"
-#include "cc/base/cc_export.h"
+#include "cc/cc_export.h"
 
 namespace base {
 class Value;
 namespace trace_event {
 class TracedValue;
 }  // namespace trace_event
 }  // namespace base
 
 namespace cc {
 
@@ skipping 34 matching lines @@
 struct CC_EXPORT ElementIdHash {
   size_t operator()(ElementId key) const;
 };
 
 // Stream operator so ElementId can be used in assertion statements.
 CC_EXPORT std::ostream& operator<<(std::ostream& out, const ElementId& id);
 
 }  // namespace cc
 
 #endif  // CC_TREES_ELEMENT_ID_H_