Revert of [heap] Add more tasks for parallel compaction

test/cctest/test-spaces.cc

Index: test/cctest/test-spaces.cc
diff --git a/test/cctest/test-spaces.cc b/test/cctest/test-spaces.cc
index 5da7d9e50612be9c7a776a4501089ebc657ccc62..a744bb79a7d4658acd5209158b021a4095d8c48e 100644
--- a/test/cctest/test-spaces.cc
+++ b/test/cctest/test-spaces.cc
@@ -507,8 +507,8 @@
   CHECK_EQ(compaction_space->CountTotalPages(), 0);
   CHECK_EQ(compaction_space->Capacity(), 0);
   // Make the rest of memory available for compaction.
-  compaction_space->AddMemory(HeapObject::cast(chunk)->address(),
-                              static_cast<int>(rest));
+  compaction_space->AddExternalMemory(HeapObject::cast(chunk)->address(),
+                                      static_cast<int>(rest));
   CHECK_EQ(compaction_space->CountTotalPages(), 0);
   CHECK_EQ(compaction_space->Capacity(), rest);
   while (num_rest_objects-- > 0) {