FileSystem: Migrate ExecutionContextTask to WTF::Closure

third_party/WebKit/Source/modules/filesystem/DirectoryReader.cpp

 /*
  * 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 84 matching lines @@
 
   if (m_entriesCallback) {
     // Non-null m_entriesCallback means multiple readEntries() calls are made
     // concurrently. We don't allow doing it.
     filesystem()->reportError(ScriptErrorCallback::wrap(errorCallback),
                               FileError::kInvalidStateErr);
     return;
   }
 
   if (!m_hasMoreEntries || !m_entries.isEmpty()) {
-    if (entriesCallback)
+    if (entriesCallback) {
       DOMFileSystem::scheduleCallback(
           filesystem()->getExecutionContext(),
-          createSameThreadTask(&EntriesCallback::handleEvent,
-                               wrapPersistent(entriesCallback),
-                               PersistentHeapVector<Member<Entry>>(m_entries)));
+          WTF::bind(&EntriesCallback::handleEvent,
+                    wrapPersistent(entriesCallback),
+                    PersistentHeapVector<Member<Entry>>(m_entries)));
+    }
     m_entries.clear();
     return;
   }
 
   m_entriesCallback = entriesCallback;
   m_errorCallback = errorCallback;
 }
 
 void DirectoryReader::addEntries(const EntryHeapVector& entries) {
   m_entries.appendVector(entries);
@@ skipping 14 matching lines @@
 }
 
 DEFINE_TRACE(DirectoryReader) {
   visitor->trace(m_entries);
   visitor->trace(m_entriesCallback);
   visitor->trace(m_errorCallback);
   DirectoryReaderBase::trace(visitor);
 }
 
 }  // namespace blink