deps: V8: backport 2a23d9fa5217

Original commit message:

    Add Isolate::GetHashSeed() for testing purposes

    Embedders can get hash seed using native syntax prior to 13.4 but they
    can't after the upgrade. Prior work was done using the following code
    https://github.com/nodejs/node/blob/13d5a2f7025cf077db7a85548a75b2b429004045/test/fixtures/guess-hash-seed.js

    After this change V8 provides a valid way of getting the hash seed.

    Change-Id: I875f5ff721db1a3336dd67c61c1e72f05d7b7cf7
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/6286748
    Reviewed-by: Erik Corry <[email protected]>
    Reviewed-by: Leszek Swirski <[email protected]>
    Commit-Queue: Erik Corry <[email protected]>
    Cr-Commit-Position: refs/heads/main@{#98848}

Refs: v8/v8@2a23d9f
Co-authored-by: Michaël Zasso <[email protected]>

Author: anonrig

common.gypi

@@ -37,7 +37,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.8',
+    'v8_embedder_string': '-node.9',
 
     ##### V8 defaults for Node.js #####
 

deps/v8/include/v8-isolate.h

@@ -1883,6 +1883,11 @@ class V8_EXPORT Isolate {
    */
   std::string GetDefaultLocale();
 
+  /**
+   * Returns the hash seed for that isolate, for testing purposes.
+   */
+  uint64_t GetHashSeed();
+
   Isolate() = delete;
   ~Isolate() = delete;
   Isolate(const Isolate&) = delete;

deps/v8/src/api/api.cc

@@ -11051,6 +11051,11 @@ std::string Isolate::GetDefaultLocale() {
 #endif
 }
 
+uint64_t Isolate::GetHashSeed() {
+  i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(this);
+  return HashSeed(i_isolate);
+}
+
 #if defined(V8_ENABLE_ETW_STACK_WALKING)
 void Isolate::SetFilterETWSessionByURLCallback(
     FilterETWSessionByURLCallback callback) {

deps/v8/test/cctest/test-api.cc

@@ -31175,3 +31175,10 @@ TEST(WrappedFunctionWithClass) {
   maybe_instance = the_class->NewInstance(context, 0, nullptr);
   CHECK(!maybe_instance.IsEmpty());
 }
+
+TEST(GettingHashSeed) {
+  LocalContext env;
+  v8::Isolate* isolate = env->GetIsolate();
+  // Validate existence of the function.
+  CHECK_GT(isolate->GetHashSeed(), 0);
+}