Version 4.3.61.15 (cherry-pick)

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index eff88450f6fac9c9e07944e8a45060c1fb5dc57b..fd024c7961b7e024c5a561e0d42f9ab126528df4 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -3443,6 +3443,17 @@ class V8_EXPORT ArrayBufferView : public Object {
    */
   size_t ByteLength();
 
+  /**
+   * Copy the contents of the ArrayBufferView's buffer to an embedder defined
+   * memory without additional overhead that calling ArrayBufferView::Buffer
+   * might incur.
+   *
+   * Will write at most min(|byte_length|, ByteLength) bytes starting at
+   * ByteOffset of the underling buffer to the memory starting at |dest|.
+   * Returns the number of bytes actually written.
+   */
+  size_t CopyContents(void* dest, size_t byte_length);
+
   V8_INLINE static ArrayBufferView* Cast(Value* obj);
 
   static const int kInternalFieldCount =