Reland of "[heap] Report wrappers after processing the marking deque incrementally"

test/unittests/heap/embedder-tracing-unittest.cc

Index: test/unittests/heap/embedder-tracing-unittest.cc
diff --git a/test/unittests/heap/embedder-tracing-unittest.cc b/test/unittests/heap/embedder-tracing-unittest.cc
index 5e53177238284afef6332ef8962d18cc52d3caea..e6a6f2e250b117d951070b376de511c055921303 100644
--- a/test/unittests/heap/embedder-tracing-unittest.cc
+++ b/test/unittests/heap/embedder-tracing-unittest.cc
@@ -135,6 +135,7 @@ TEST(LocalEmbedderHeapTracer, TraceFinishes) {
   local_tracer.AddWrapperToTrace(CreateWrapperInfo());
   EXPECT_EQ(1u, local_tracer.NumberOfCachedWrappersToTrace());
   EXPECT_CALL(remote_tracer, RegisterV8References(_));
+  local_tracer.RegisterWrappersWithRemoteTracer();
   EXPECT_CALL(remote_tracer, AdvanceTracing(0, _)).WillOnce(Return(false));
   EXPECT_FALSE(local_tracer.Trace(
       0, EmbedderHeapTracer::AdvanceTracingActions(
@@ -149,6 +150,7 @@ TEST(LocalEmbedderHeapTracer, TraceDoesNotFinish) {
   local_tracer.AddWrapperToTrace(CreateWrapperInfo());
   EXPECT_EQ(1u, local_tracer.NumberOfCachedWrappersToTrace());
   EXPECT_CALL(remote_tracer, RegisterV8References(_));
+  local_tracer.RegisterWrappersWithRemoteTracer();
   EXPECT_CALL(remote_tracer, AdvanceTracing(0, _)).WillOnce(Return(true));
   EXPECT_TRUE(local_tracer.Trace(
       0, EmbedderHeapTracer::AdvanceTracingActions(