Re-reland "Flush parallel recompilation queues on context dispose notification"

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index 1b6bf8eb019d3466bc70d55fe49aa5a06832fe01..41ab43e81b26056df9bf4e0426a147abe43ab56c 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -1254,10 +1254,7 @@ class Heap {
   void EnsureHeapIsIterable();
 
   // Notify the heap that a context has been disposed.
-  int NotifyContextDisposed() {
-    flush_monomorphic_ics_ = true;
-    return ++contexts_disposed_;
-  }
+  int NotifyContextDisposed();
 
   // Utility to invoke the scavenger. This is needed in test code to
   // ensure correct callback for weak global handles.