Specify TaskType of posted Task explicitly in DataTransferItem (1)

third_party/WebKit/Source/core/dom/StringCallback.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 19 matching lines @@
 
 #ifndef StringCallback_h
 #define StringCallback_h
 
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 
 namespace blink {
 
 class ExecutionContext;
+enum class TaskType : unsigned;
 
 class StringCallback : public GarbageCollectedFinalized<StringCallback> {
  public:
   virtual ~StringCallback() {}
   DEFINE_INLINE_VIRTUAL_TRACE() {}
   virtual void handleEvent(const String& data) = 0;
 
   // Helper to post callback task.
-  static void scheduleCallback(StringCallback*,
+  static void scheduleCallback(TaskType,
+                               StringCallback*,
                                ExecutionContext*,
                                const String& data,
                                const String& instrumentationName);
 };
 
 }  // namespace blink
 
 #endif  // StringCallback_h