Remove dependency on m_previousPositionFromPaintInvalidationBacking for spv2

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/RuntimeEnabledFeatures.h"
 #include "platform/geometry/LayoutPoint.h"
@@ skipping 51 matching lines @@
     {
         return adoptPtr(new DisplayItemList());
     }
 
     // These methods are called during paint invalidation.
     void invalidate(const DisplayItemClientWrapper&);
     void invalidateUntracked(DisplayItemClient);
     void invalidateAll();
 
     // Record when paint offsets change during paint.
-    void invalidatePaintOffset(DisplayItemClient);
+    void invalidatePaintOffset(const DisplayItemClientWrapper&);
 #if ENABLE(ASSERT)
     bool paintOffsetWasInvalidated(DisplayItemClient) const;
 #endif
 
     // Record a new paint offset.
     // TODO(pdr): Remove these once the paint offset cache is on LayoutObject.
     void recordPaintOffset(DisplayItemClient, const LayoutPoint&);
     bool paintOffsetIsUnchanged(DisplayItemClient, const LayoutPoint&) const;
 
     // These methods are called during painting.
@@ skipping 161 matching lines @@
     // the duplicated ids are from.
     DisplayItemIndicesByClientMap m_newDisplayItemIndicesByClient;
 #endif
 
     OwnPtr<Vector<String>> m_trackedPaintInvalidationObjects;
 };
 
 } // namespace blink
 
 #endif // DisplayItemList_h