Introduce MicrotasksCompletedCallback.

src/isolate.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ISOLATE_H_
 #define V8_ISOLATE_H_
 
 #include <queue>
 #include <set>
 
@@ skipping 1043 matching lines @@
   Handle<JSObject> GetSymbolRegistry();
 
   void AddCallCompletedCallback(CallCompletedCallback callback);
   void RemoveCallCompletedCallback(CallCompletedCallback callback);
   void FireCallCompletedCallback();
 
   void AddBeforeCallEnteredCallback(BeforeCallEnteredCallback callback);
   void RemoveBeforeCallEnteredCallback(BeforeCallEnteredCallback callback);
   void FireBeforeCallEnteredCallback();
 
+  void AddMicrotasksCompletedCallback(MicrotasksCompletedCallback callback);
+  void RemoveMicrotasksCompletedCallback(MicrotasksCompletedCallback callback);
+  void FireMicrotasksCompletedCallback();
+
   void SetPromiseRejectCallback(PromiseRejectCallback callback);
   void ReportPromiseReject(Handle<JSObject> promise, Handle<Object> value,
                            v8::PromiseRejectEvent event);
 
   void EnqueueMicrotask(Handle<Object> microtask);
   void RunMicrotasks();
 
   void SetUseCounterCallback(v8::Isolate::UseCounterCallback callback);
   void CountUsage(v8::Isolate::UseCounterFeature feature);
 
@@ skipping 128 matching lines @@
 
   // Propagate pending exception message to the v8::TryCatch.
   // If there is no external try-catch or message was successfully propagated,
   // then return true.
   bool PropagatePendingExceptionToExternalTryCatch();
 
   // Remove per-frame stored materialized objects when we are unwinding
   // the frame.
   void RemoveMaterializedObjectsOnUnwind(StackFrame* frame);
 
+  void RunMicrotasksInternal();
+
   base::Atomic32 id_;
   EntryStackItem* entry_stack_;
   int stack_trace_nesting_level_;
   StringStream* incomplete_message_;
   Address isolate_addresses_[kIsolateAddressCount + 1];  // NOLINT
   Bootstrapper* bootstrapper_;
   RuntimeProfiler* runtime_profiler_;
   CompilationCache* compilation_cache_;
   Counters* counters_;
   CodeRange* code_range_;
@@ skipping 101 matching lines @@
 #if TRACE_MAPS
   int next_unique_sfi_id_;
 #endif
 
   // List of callbacks before a Call starts execution.
   List<BeforeCallEnteredCallback> before_call_entered_callbacks_;
 
   // List of callbacks when a Call completes.
   List<CallCompletedCallback> call_completed_callbacks_;
 
+  // List of callbacks after microtasks were run.
+  List<MicrotasksCompletedCallback> microtasks_completed_callbacks_;
+
   v8::Isolate::UseCounterCallback use_counter_callback_;
   BasicBlockProfiler* basic_block_profiler_;
 
   List<Object*> partial_snapshot_cache_;
 
   v8::ArrayBuffer::Allocator* array_buffer_allocator_;
 
   FutexWaitListNode futex_wait_list_node_;
 
   CancelableTaskManager* cancelable_task_manager_;
@@ skipping 223 matching lines @@
 
   EmbeddedVector<char, 128> filename_;
   FILE* file_;
   int scope_depth_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ISOLATE_H_