Abort running compiler dispatcher tasks under memory pressure

src/cancelable-task.h

Index: src/cancelable-task.h
diff --git a/src/cancelable-task.h b/src/cancelable-task.h
index 04f775cbe8d7668df2bcc794cde66e7c7c9d8cb9..5b1a5f1def2f8d67f11607dfc81a2fe30033cec7 100644
--- a/src/cancelable-task.h
+++ b/src/cancelable-task.h
@@ -134,7 +134,8 @@ class V8_EXPORT_PRIVATE Cancelable {
 
 
 // Multiple inheritance can be used because Task is a pure interface.
-class CancelableTask : public Cancelable, public Task {
+class V8_EXPORT_PRIVATE CancelableTask : public Cancelable,
+                                         NON_EXPORTED_BASE(public Task) {
  public:
   explicit CancelableTask(Isolate* isolate);
   CancelableTask(Isolate* isolate, CancelableTaskManager* manager);