Externalization API for ArrayBuffer

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index e974a0e3740c828b4635822b22d5b3e35b86ded5..3eab06c69ec608bd1901ddf868457c1ca86111ee 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -5313,6 +5313,17 @@ void JSArrayBuffer::set_backing_store(void* value, WriteBarrierMode mode) {
 
 
 ACCESSORS(JSArrayBuffer, byte_length, Object, kByteLengthOffset)
+ACCESSORS_TO_SMI(JSArrayBuffer, flag, kFlagOffset)
+
+
+bool JSArrayBuffer::is_external() {
+  return BooleanBit::get(flag(), kIsExternalBit);
+}
+
+
+void JSArrayBuffer::set_is_external(bool value) {
+  set_flag(BooleanBit::set(flag(), kIsExternalBit, value));
+}
 
 
 ACCESSORS(JSTypedArray, buffer, Object, kBufferOffset)
@@ -5320,7 +5331,6 @@ ACCESSORS(JSTypedArray, byte_offset, Object, kByteOffsetOffset)
 ACCESSORS(JSTypedArray, byte_length, Object, kByteLengthOffset)
 ACCESSORS(JSTypedArray, length, Object, kLengthOffset)
 
-
 ACCESSORS(JSRegExp, data, Object, kDataOffset)