[heap] Fix Unmapper::TearDown to include delayed chunks

src/heap/spaces.h

 // Copyright 2011 the V8 project 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 V8_HEAP_SPACES_H_
 #define V8_HEAP_SPACES_H_
 
 #include <list>
 #include <memory>
 #include <unordered_set>
@@ skipping 1115 matching lines @@
         if (chunk != nullptr) {
           // For stolen chunks we need to manually free any allocated memory.
           chunk->ReleaseAllocatedMemory();
         }
       }
       return chunk;
     }
 
     void FreeQueuedChunks();
     bool WaitUntilCompleted();
+    void TearDown();
 
    private:
     enum ChunkQueueType {
       kRegular,     // Pages of kPageSize that do not live in a CodeRange and
                     // can thus be used for stealing.
       kNonRegular,  // Large chunks and executable chunks.
       kPooled,      // Pooled chunks, already uncommited and ready for reuse.
       kNumberOfChunkQueues,
     };
 
@@ skipping 1755 matching lines @@
   PageIterator old_iterator_;
   PageIterator code_iterator_;
   PageIterator map_iterator_;
   LargePageIterator lo_iterator_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_SPACES_H_