Revert of Client side display item cache flag

third_party/WebKit/Source/platform/testing/FakeDisplayItemClient.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 FakeDisplayItemClient_h
 #define FakeDisplayItemClient_h
 
 #include "platform/geometry/LayoutRect.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 // A simple DisplayItemClient implementation suitable for use in unit tests.
 class FakeDisplayItemClient : public DisplayItemClient {
 public:
     FakeDisplayItemClient(const String& name = "FakeDisplayItemClient", const LayoutRect& visualRect = LayoutRect())
         : m_name(name), m_visualRect(visualRect)
     { }
 
     String debugName() const final { return m_name; }
     LayoutRect visualRect() const override { return m_visualRect; }
 
 private:
-    DISPLAY_ITEM_CACHE_STATUS_IMPLEMENTATION
-
     String m_name;
     LayoutRect m_visualRect;
 };
 
 } // namespace blink
 
 #endif // FakeDisplayItemClient_h