Revert of Remove the weak list of array buffers

src/heap/heap.h

Index: src/heap/heap.h
diff --git a/src/heap/heap.h b/src/heap/heap.h
index 75e47ea4d3e88de9b8f7fb9b729058eb83779292..d019293c7b0e08cac803f3a6dfb756100b500c60 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -6,7 +6,6 @@
 #define V8_HEAP_HEAP_H_
 
 #include <cmath>
-#include <map>
 
 #include "src/allocation.h"
 #include "src/assert-scope.h"
@@ -875,6 +874,16 @@
   }
   Object* native_contexts_list() const { return native_contexts_list_; }
 
+  void set_array_buffers_list(Object* object) { array_buffers_list_ = object; }
+  Object* array_buffers_list() const { return array_buffers_list_; }
+
+  void set_last_array_buffer_in_list(Object* object) {
+    last_array_buffer_in_list_ = object;
+  }
+  Object* last_array_buffer_in_list() const {
+    return last_array_buffer_in_list_;
+  }
+
   void set_allocation_sites_list(Object* object) {
     allocation_sites_list_ = object;
   }
@@ -1481,11 +1490,6 @@
 
   bool deserialization_complete() const { return deserialization_complete_; }
 
-  void RegisterNewArrayBuffer(void* data, size_t length);
-  void UnregisterArrayBuffer(void* data);
-  void RegisterLiveArrayBuffer(void* data);
-  void FreeDeadArrayBuffers();
-
  protected:
   // Methods made available to tests.
 
@@ -1656,6 +1660,8 @@
   // Weak list heads, threaded through the objects.
   // List heads are initialized lazily and contain the undefined_value at start.
   Object* native_contexts_list_;
+  Object* array_buffers_list_;
+  Object* last_array_buffer_in_list_;
   Object* allocation_sites_list_;
 
   // List of encountered weak collections (JSWeakMap and JSWeakSet) during
@@ -1989,6 +1995,7 @@
   void MarkCompactEpilogue();
 
   void ProcessNativeContexts(WeakObjectRetainer* retainer);
+  void ProcessArrayBuffers(WeakObjectRetainer* retainer, bool stop_after_young);
   void ProcessAllocationSites(WeakObjectRetainer* retainer);
 
   // Deopts all code that contains allocation instruction which are tenured or
@@ -2148,9 +2155,6 @@
   bool deserialization_complete_;
 
   bool concurrent_sweeping_enabled_;
-
-  std::map<void*, size_t> live_array_buffers_;
-  std::map<void*, size_t> not_yet_discovered_array_buffers_;
 
   friend class AlwaysAllocateScope;
   friend class Deserializer;