[SPv2] Defer decision of raster invalidation after paint for changes z-index, transform, etc.

third_party/WebKit/Source/platform/graphics/paint/PaintController.h

Index: third_party/WebKit/Source/platform/graphics/paint/PaintController.h
diff --git a/third_party/WebKit/Source/platform/graphics/paint/PaintController.h b/third_party/WebKit/Source/platform/graphics/paint/PaintController.h
index a003376d96745bbb41733766d4ad783fd9699756..fc961f5366b9e784e8d725f8aa747cfafe82fb95 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/PaintController.h
+++ b/third_party/WebKit/Source/platform/graphics/paint/PaintController.h
@@ -165,7 +165,7 @@ protected:
         , m_imagePainted(false)
         , m_skippingCacheCount(0)
         , m_numCachedNewItems(0)
-        , m_currentChunkIsFromCachedSubsequence(true)
+        , m_currentCachedSubsequenceBeginIndexInNewList(kNotFound)
 #if DCHECK_IS_ON()
         , m_numSequentialMatches(0)
         , m_numOutOfOrderMatches(0)
@@ -210,6 +210,8 @@ private:
 
     void generateChunkRasterInvalidationRects(PaintChunk& newChunk);
     void generateChunkRasterInvalidationRectsComparingOldChunk(PaintChunk& newChunk, const PaintChunk& oldChunk);
+    void generateChunkRasterInvalidationRectsForReorderedItems(PaintChunk& newChunk, const PaintChunk& oldChunk,
+        Vector<size_t>::const_iterator, Vector<size_t>::const_iterator, Vector<size_t>::const_iterator, Vector<size_t>::const_iterator);
 
 #if DCHECK_IS_ON()
     // The following two methods are for checking under-invalidations
@@ -262,7 +264,7 @@ private:
     // - chunks are matched not only for requests of cached display items, but also non-cached display items.
     IndicesByClientMap m_outOfOrderChunkIndices;
 
-    bool m_currentChunkIsFromCachedSubsequence;
+    size_t m_currentCachedSubsequenceBeginIndexInNewList;
     size_t m_nextChunkToMatch;
 
     DisplayItemClient::CacheGenerationOrInvalidationReason m_currentCacheGeneration;