[heap] Add API function for checking if the heap limit was increased

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 1aafd0b709f0856879a529a74102bf435705e40a..b841bd9b58d9093dd18fd7914ca01401966d460f 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -8496,6 +8496,11 @@ void Isolate::RestoreOriginalHeapLimit() {
   isolate->heap()->RestoreOriginalHeapLimit();
 }
 
+bool Isolate::IsHeapLimitIncreasedForDebugging() {
+  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
+  return isolate->heap()->IsHeapLimitIncreasedForDebugging();
+}
+
 void Isolate::SetJitCodeEventHandler(JitCodeEventOptions options,
                                      JitCodeEventHandler event_handler) {
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);