Class/struct layout optimization for blink Resource related classes

third_party/WebKit/Source/core/loader/HistoryItem.h

 /*
  * Copyright (C) 2006, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Research In Motion Limited. 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
@@ skipping 25 matching lines @@
 #include "platform/scroll/ScrollTypes.h"
 #include "platform/weborigin/Referrer.h"
 #include "platform/wtf/text/WTFString.h"
 
 namespace blink {
 
 class DocumentState;
 class EncodedFormData;
 class KURL;
 class ResourceRequest;
-enum class WebCachePolicy;
+enum class WebCachePolicy : uint8_t;
 
 class CORE_EXPORT HistoryItem final
     : public GarbageCollectedFinalized<HistoryItem> {
  public:
   static HistoryItem* Create() { return new HistoryItem; }
   ~HistoryItem();
 
   const String& UrlString() const;
   KURL Url() const;
 
@@ skipping 88 matching lines @@
   RefPtr<SerializedScriptValue> state_object_;
 
   // info used to repost form data
   RefPtr<EncodedFormData> form_data_;
   AtomicString form_content_type_;
 };  // class HistoryItem
 
 }  // namespace blink
 
 #endif  // HISTORYITEM_H