Don't call DisplayItemRasterInvalidator for cached paint chunks

This improves performance of RasterInvalidator when some paint chunks
are moved from cached subsequences.

No functional behavior change.

Change-Id: I8cc492200c033ee2759c63f908571722c0a09df0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2363649Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799673}

third_party/blink/renderer/platform/graphics/paint/raster_invalidator.cc

@@ -253,7 +253,8 @@ void RasterInvalidator::GenerateRasterInvalidations(
                                      new_chunk.id.client);
       }
 
-      if (&new_paint_artifact != old_paint_artifact_) {
+      if (&new_paint_artifact != old_paint_artifact_ &&
+          !new_chunk.is_moved_from_cached_subsequence) {
         DisplayItemRasterInvalidator(*this, function, *old_paint_artifact_,
                                      new_paint_artifact, old_chunk, new_chunk,
                                      mapper)