diff --git a/deps/v8/include/v8.h b/deps/v8/include/v8.h
index bfd049d1fbbd9e..25b5eb3c08e628 100644
--- a/deps/v8/include/v8.h
+++ b/deps/v8/include/v8.h
@@ -5101,7 +5101,8 @@ class V8_EXPORT SharedArrayBuffer : public Object {
           allocation_length_(0),
           allocation_mode_(Allocator::AllocationMode::kNormal),
           deleter_(nullptr),
-          deleter_data_(nullptr) {}
+          deleter_data_(nullptr),
+          is_growable_(false) {}
 
     void* AllocationBase() const { return allocation_base_; }
     size_t AllocationLength() const { return allocation_length_; }
@@ -5113,12 +5114,13 @@ class V8_EXPORT SharedArrayBuffer : public Object {
     size_t ByteLength() const { return byte_length_; }
     DeleterCallback Deleter() const { return deleter_; }
     void* DeleterData() const { return deleter_data_; }
+    bool IsGrowable() const { return is_growable_; }
 
    private:
     Contents(void* data, size_t byte_length, void* allocation_base,
              size_t allocation_length,
              Allocator::AllocationMode allocation_mode, DeleterCallback deleter,
-             void* deleter_data);
+             void* deleter_data, bool is_growable);
 
     void* data_;
     size_t byte_length_;
@@ -5127,6 +5129,7 @@ class V8_EXPORT SharedArrayBuffer : public Object {
     Allocator::AllocationMode allocation_mode_;
     DeleterCallback deleter_;
     void* deleter_data_;
+    bool is_growable_;
 
     friend class SharedArrayBuffer;
   };
@@ -6657,8 +6660,7 @@ class V8_EXPORT MicrotaskQueue {
   /**
    * Creates an empty MicrotaskQueue instance.
    */
-  static std::unique_ptr<MicrotaskQueue> New(
-      Isolate* isolate, MicrotasksPolicy policy = MicrotasksPolicy::kAuto);
+  static std::unique_ptr<MicrotaskQueue> New(Isolate* isolate);
 
   virtual ~MicrotaskQueue() = default;
 
@@ -6706,15 +6708,6 @@ class V8_EXPORT MicrotaskQueue {
    */
   virtual bool IsRunningMicrotasks() const = 0;
 
-  /**
-   * Returns the current depth of nested MicrotasksScope that has
-   * kRunMicrotasks.
-   */
-  virtual int GetMicrotasksScopeDepth() const = 0;
-
-  MicrotaskQueue(const MicrotaskQueue&) = delete;
-  MicrotaskQueue& operator=(const MicrotaskQueue&) = delete;
-
  private:
   friend class internal::MicrotaskQueue;
   MicrotaskQueue() = default;
diff --git a/deps/v8/src/api/api.cc b/deps/v8/src/api/api.cc
index 80592ca0ba4fde..592230155ed3ea 100644
--- a/deps/v8/src/api/api.cc
+++ b/deps/v8/src/api/api.cc
@@ -7409,14 +7409,15 @@ v8::SharedArrayBuffer::Contents v8::SharedArrayBuffer::Externalize() {
 v8::SharedArrayBuffer::Contents::Contents(
     void* data, size_t byte_length, void* allocation_base,
     size_t allocation_length, Allocator::AllocationMode allocation_mode,
-    DeleterCallback deleter, void* deleter_data)
+    DeleterCallback deleter, void* deleter_data, bool is_growable)
     : data_(data),
       byte_length_(byte_length),
       allocation_base_(allocation_base),
       allocation_length_(allocation_length),
       allocation_mode_(allocation_mode),
       deleter_(deleter),
-      deleter_data_(deleter_data) {
+      deleter_data_(deleter_data),
+      is_growable_(is_growable) {
   DCHECK_LE(allocation_base_, data_);
   DCHECK_LE(byte_length_, allocation_length_);
 }
@@ -7434,7 +7435,8 @@ v8::SharedArrayBuffer::Contents v8::SharedArrayBuffer::GetContents() {
           : reinterpret_cast<Contents::DeleterCallback>(ArrayBufferDeleter),
       self->is_wasm_memory()
           ? static_cast<void*>(self->GetIsolate()->wasm_engine())
-          : static_cast<void*>(self->GetIsolate()->array_buffer_allocator()));
+          : static_cast<void*>(self->GetIsolate()->array_buffer_allocator()),
+      false);
   return contents;
 }
 
@@ -8561,13 +8563,8 @@ void v8::Isolate::LocaleConfigurationChangeNotification() {
 }
 
 // static
-std::unique_ptr<MicrotaskQueue> MicrotaskQueue::New(Isolate* isolate,
-                                                    MicrotasksPolicy policy) {
-  auto microtask_queue =
-      i::MicrotaskQueue::New(reinterpret_cast<i::Isolate*>(isolate));
-  microtask_queue->set_microtasks_policy(policy);
-  std::unique_ptr<MicrotaskQueue> ret(std::move(microtask_queue));
-  return ret;
+std::unique_ptr<MicrotaskQueue> MicrotaskQueue::New(Isolate* isolate) {
+  return i::MicrotaskQueue::New(reinterpret_cast<i::Isolate*>(isolate));
 }
 
 MicrotasksScope::MicrotasksScope(Isolate* isolate, MicrotasksScope::Type type)
diff --git a/deps/v8/src/execution/microtask-queue.cc b/deps/v8/src/execution/microtask-queue.cc
index 8088935154309d..95a99b1465dcad 100644
--- a/deps/v8/src/execution/microtask-queue.cc
+++ b/deps/v8/src/execution/microtask-queue.cc
@@ -211,10 +211,6 @@ void MicrotaskQueue::IterateMicrotasks(RootVisitor* visitor) {
   }
 }
 
-int MicrotaskQueue::GetMicrotasksScopeDepth() const {
-  return microtasks_depth_;
-}
-
 void MicrotaskQueue::AddMicrotasksCompletedCallback(
     MicrotasksCompletedCallbackWithData callback, void* data) {
   CallbackWithData callback_with_data(callback, data);
diff --git a/deps/v8/src/execution/microtask-queue.h b/deps/v8/src/execution/microtask-queue.h
index 4ce1498279c1a6..070668fb4723c9 100644
--- a/deps/v8/src/execution/microtask-queue.h
+++ b/deps/v8/src/execution/microtask-queue.h
@@ -62,7 +62,7 @@ class V8_EXPORT_PRIVATE MicrotaskQueue final : public v8::MicrotaskQueue {
   // invocation, which happens when depth reaches zero.
   void IncrementMicrotasksScopeDepth() { ++microtasks_depth_; }
   void DecrementMicrotasksScopeDepth() { --microtasks_depth_; }
-  int GetMicrotasksScopeDepth() const override;
+  int GetMicrotasksScopeDepth() const { return microtasks_depth_; }
 
   // Possibly nested microtasks suppression scopes prevent microtasks
   // from running.