Reland "Remove the weak list of array buffers"

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 7244d17b0cceaf663bb107656d6642062127ba68..fef2d77f618a57d761f6076afe6562ba8158773c 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -10258,9 +10258,6 @@ class JSArrayBuffer: public JSObject {
   inline bool was_neutered();
   inline void set_was_neutered(bool value);
 
-  // [weak_next]: linked list of array buffers.
-  DECL_ACCESSORS(weak_next, Object)
-
   DECLARE_CAST(JSArrayBuffer)
 
   void Neuter();
@@ -10277,8 +10274,7 @@ class JSArrayBuffer: public JSObject {
 #else
   static const int kBitFieldOffset = kBitFieldSlot + kIntSize;
 #endif
-  static const int kWeakNextOffset = kBitFieldSlot + kPointerSize;
-  static const int kSize = kWeakNextOffset + kPointerSize;
+  static const int kSize = kBitFieldSlot + kPointerSize;
 
   static const int kSizeWithInternalFields =
       kSize + v8::ArrayBuffer::kInternalFieldCount * kPointerSize;