Use a new Supplement constructor for supplements in core/

third_party/WebKit/Source/core/fileapi/FileReader.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 63 matching lines @@
   USING_GARBAGE_COLLECTED_MIXIN(FileReader::ThrottlingController);
 
  public:
   static ThrottlingController* from(ExecutionContext* context) {
     if (!context)
       return 0;
 
     ThrottlingController* controller = static_cast<ThrottlingController*>(
         Supplement<ExecutionContext>::from(*context, supplementName()));
     if (!controller) {
-      controller = new ThrottlingController;
+      controller = new ThrottlingController(*context);
       provideTo(*context, supplementName(), controller);
     }
     return controller;
   }
 
   enum FinishReaderType { DoNotRunPendingReaders, RunPendingReaders };
 
   static void pushReader(ExecutionContext* context, FileReader* reader) {
     ThrottlingController* controller = from(context);
     if (!controller)
@@ skipping 24 matching lines @@
     InspectorInstrumentation::asyncTaskCanceled(context, reader);
   }
 
   DEFINE_INLINE_TRACE() {
     visitor->trace(m_pendingReaders);
     visitor->trace(m_runningReaders);
     Supplement<ExecutionContext>::trace(visitor);
   }
 
  private:
-  ThrottlingController()
-      : m_maxRunningReaders(kMaxOutstandingRequestsPerThread) {}
+  explicit ThrottlingController(ExecutionContext& context)
+      : Supplement<ExecutionContext>(context),
+        m_maxRunningReaders(kMaxOutstandingRequestsPerThread) {}
 
   void pushReader(FileReader* reader) {
     if (m_pendingReaders.isEmpty() &&
         m_runningReaders.size() < m_maxRunningReaders) {
       reader->executePendingRead();
       ASSERT(!m_runningReaders.contains(reader));
       m_runningReaders.add(reader);
       return;
     }
     m_pendingReaders.append(reader);
@@ skipping 327 matching lines @@
         ProgressEvent::create(type, false, m_loader->bytesLoaded(), 0));
 }
 
 DEFINE_TRACE(FileReader) {
   visitor->trace(m_error);
   EventTargetWithInlineData::trace(visitor);
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink