Remove unnecessary methods and collapse function calls in the preloader code

Source/core/html/parser/HTMLResourcePreloader.h

 /*
  * Copyright (C) 2013 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 28 matching lines @@
     {
         return adoptPtr(new PreloadRequest(initiatorName, initiatorPosition, resourceURL, baseURL, resourceType));
     }
 
     bool isSafeToSendToAnotherThread() const;
 
     FetchRequest resourceRequest(Document*);
 
     const String& charset() const { return m_charset; }
     double discoveryTime() const { return m_discoveryTime; }
-    FetchRequest::DeferOption defer() const { return m_defer; }
     void setDefer(FetchRequest::DeferOption defer) { m_defer = defer; }
     void setCharset(const String& charset) { m_charset = charset.isolatedCopy(); }
     void setCrossOriginEnabled(StoredCredentials allowCredentials)
     {
         m_isCORSEnabled = true;
         m_allowCredentials = allowCredentials;
     }
 
     Resource::Type resourceType() const { return m_resourceType; }
 
@@ skipping 27 matching lines @@
 
 typedef Vector<OwnPtr<PreloadRequest>> PreloadRequestStream;
 
 class HTMLResourcePreloader final : public NoBaseWillBeGarbageCollected<HTMLResourcePreloader> {
     WTF_MAKE_NONCOPYABLE(HTMLResourcePreloader); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
 public:
     static PassOwnPtrWillBeRawPtr<HTMLResourcePreloader> create(Document&);
     void trace(Visitor*);
 
     void takeAndPreload(PreloadRequestStream&);
-    void preload(PassOwnPtr<PreloadRequest>);
 
 private:
     explicit HTMLResourcePreloader(Document&);
 
+    void preload(PassOwnPtr<PreloadRequest>);
+
     RawPtrWillBeMember<Document> m_document;
 };
 
 }
 
 #endif