Add internal fields to JSArrayBufferViews (JSTypedArray and JSDataView)

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 3afb83572a903e690e377c2b8bce5f900e60404d..e27c094be2effc8b4e35be74e0859d0a9682370e 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -2377,6 +2377,7 @@ class V8EXPORT Function : public Object {
 };
 
 #ifndef V8_ARRAY_BUFFER_INTERNAL_FIELD_COUNT
+// The number of required internal fields can be defined by embedder.
 #define V8_ARRAY_BUFFER_INTERNAL_FIELD_COUNT 2
 #endif
 
@@ -2489,6 +2490,12 @@ class V8EXPORT ArrayBuffer : public Object {
 };
 
 
+#ifndef V8_ARRAY_BUFFER_VIEW_INTERNAL_FIELD_COUNT
+// The number of required internal fields can be defined by embedder.
+#define V8_ARRAY_BUFFER_VIEW_INTERNAL_FIELD_COUNT 2
+#endif
+
+
 /**
  * A base class for an instance of one of "views" over ArrayBuffer,
  * including TypedArrays and DataView (ES6 draft 15.13).
@@ -2516,6 +2523,9 @@ class V8EXPORT ArrayBufferView : public Object {
 
   V8_INLINE(static ArrayBufferView* Cast(Value* obj));
 
+  static const int kInternalFieldCount =
+      V8_ARRAY_BUFFER_VIEW_INTERNAL_FIELD_COUNT;
+
  private:
   ArrayBufferView();
   static void CheckCast(Value* obj);