deps: cherry-pick 6803eef from V8 upstream

Original commit message:
  Allow embedder to set promise internal field count

  Asynchronous context tracking mechanisms in Node.js need to store some
  state on all promise objects. This change will allow embedders to
  configure the number of internal fields on promises as is already done
  for ArrayBuffers.

  BUG=v8:6435

  Review-Url: https://codereview.chromium.org/2889863002
  Cr-Commit-Position: refs/heads/master@{#45496}

PR-URL: https://github.com/nodejs/node/pull/13175
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/deps/v8/BUILD.gn b/deps/v8/BUILD.gn
index 8895103222..2a77a0ded0 100644
--- a/deps/v8/BUILD.gn
+++ b/deps/v8/BUILD.gn
@@ -38,6 +38,9 @@ declare_args() {
   # Sets -dENABLE_DISASSEMBLER.
   v8_enable_disassembler = ""
 
+  # Sets the number of internal fields on promise objects.
+  v8_promise_internal_field_count = 0
+
   # Sets -dENABLE_GDB_JIT_INTERFACE.
   v8_enable_gdbjit = ""
 
@@ -197,6 +200,10 @@ config("features") {
   if (v8_enable_disassembler) {
     defines += [ "ENABLE_DISASSEMBLER" ]
   }
+  if (v8_promise_internal_field_count != 0) {
+    defines +=
+        [ "V8_PROMISE_INTERNAL_FIELD_COUNT=${v8_promise_internal_field_count}" ]
+  }
   if (v8_enable_gdbjit) {
     defines += [ "ENABLE_GDB_JIT_INTERFACE" ]
   }