[heap] Reland "Cancel tasks before tearing down the heap."

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index a15b1cf345ee00f6740e7e412aee7a745359ffa1..cbde8ac562bd515f706e639f4f2710a068f94463 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -2227,13 +2227,14 @@ void Isolate::Deinit() {
   delete heap_profiler_;
   heap_profiler_ = NULL;
 
+  cancelable_task_manager()->CancelAndWait();
+
   heap_.TearDown();
   logger_->TearDown();
 
   delete interpreter_;
   interpreter_ = NULL;
 
-  cancelable_task_manager()->CancelAndWait();
 
   delete compiler_dispatcher_tracer_;
   compiler_dispatcher_tracer_ = nullptr;