Added preloader support for sizes based RW values

Source/core/fetch/FetchRequest.h

 /*
  * Copyright (C) 2012 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 22 matching lines @@
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 class SecurityOrigin;
 
 class FetchRequest {
 public:
     enum DeferOption { NoDefer, LazyLoad, DeferredByClient };
     enum OriginRestriction { UseDefaultOriginRestrictionForType, RestrictToSameOrigin, NoOriginRestriction };
 
+    struct ResourceWidth {
+        float width;
+        bool isSet;
+
+        ResourceWidth()
+            : width(0)
+            , isSet(false)
+        {
+        }
+    };
+
     explicit FetchRequest(const ResourceRequest&, const AtomicString& initiator, const String& charset = String(), ResourceLoadPriority = ResourceLoadPriorityUnresolved);
     FetchRequest(const ResourceRequest&, const AtomicString& initiator, const ResourceLoaderOptions&);
     FetchRequest(const ResourceRequest&, const FetchInitiatorInfo&);
     ~FetchRequest();
 
     ResourceRequest& mutableResourceRequest() { return m_resourceRequest; }
     const ResourceRequest& resourceRequest() const { return m_resourceRequest; }
     const KURL& url() const { return m_resourceRequest.url(); }
     const String& charset() const { return m_charset; }
     void setCharset(const String& charset) { m_charset = charset; }
     const ResourceLoaderOptions& options() const { return m_options; }
     void setOptions(const ResourceLoaderOptions& options) { m_options = options; }
     ResourceLoadPriority priority() const { return m_priority; }
     bool forPreload() const { return m_forPreload; }
     void setForPreload(bool forPreload) { m_forPreload = forPreload; }
     DeferOption defer() const { return m_defer; }
+    ResourceWidth resourceWidth() const { return m_resourceWidth; }
     void setDefer(DeferOption defer) { m_defer = defer; }
     void setContentSecurityCheck(ContentSecurityPolicyDisposition contentSecurityPolicyOption) { m_options.contentSecurityPolicyOption = contentSecurityPolicyOption; }
     void setCrossOriginAccessControl(SecurityOrigin*, StoredCredentials, CredentialRequest);
     void setCrossOriginAccessControl(SecurityOrigin*, StoredCredentials);
     void setCrossOriginAccessControl(SecurityOrigin*, const AtomicString& crossOriginMode);
     OriginRestriction originRestriction() const { return m_originRestriction; }
     void setOriginRestriction(OriginRestriction restriction) { m_originRestriction = restriction; }
+    void setResourceWidth(ResourceWidth);
 
 private:
     ResourceRequest m_resourceRequest;
     String m_charset;
     ResourceLoaderOptions m_options;
     ResourceLoadPriority m_priority;
     bool m_forPreload;
     DeferOption m_defer;
     OriginRestriction m_originRestriction;
+    ResourceWidth m_resourceWidth;
 };
 
 } // namespace blink
 
 #endif