Added preloader support for sizes based RW values

Source/core/html/parser/HTMLPreloadScanner.cpp

Index: Source/core/html/parser/HTMLPreloadScanner.cpp
diff --git a/Source/core/html/parser/HTMLPreloadScanner.cpp b/Source/core/html/parser/HTMLPreloadScanner.cpp
index d554c9b3c8c7a38a717b2e59b88254e44d473d9e..2a5dcb3b168ed8c8df62ce7f8a343cbd159b8029 100644
--- a/Source/core/html/parser/HTMLPreloadScanner.cpp
+++ b/Source/core/html/parser/HTMLPreloadScanner.cpp
@@ -112,6 +112,7 @@ public:
         , m_inputIsImage(false)
         , m_sourceSize(0)
         , m_sourceSizeSet(false)
+        , m_resourceWidth(-1)
         , m_isCORSEnabled(false)
         , m_defer(FetchRequest::NoDefer)
         , m_allowCredentials(DoNotAllowStoredCredentials)
@@ -168,7 +169,7 @@ public:
             return nullptr;
 
         TextPosition position = TextPosition(source.currentLine(), source.currentColumn());
-        OwnPtr<PreloadRequest> request = PreloadRequest::create(initiatorFor(m_tagImpl), position, m_urlToLoad, predictedBaseURL, resourceType());
+        OwnPtr<PreloadRequest> request = PreloadRequest::create(initiatorFor(m_tagImpl), position, m_urlToLoad, predictedBaseURL, resourceType(), m_resourceWidth);
         if (isCORSEnabled())
             request->setCrossOriginEnabled(allowStoredCredentials());
         request->setCharset(charset());
@@ -209,6 +210,8 @@ private:
             if (!m_srcsetImageCandidate.isEmpty()) {
                 m_srcsetImageCandidate = bestFitSourceForSrcsetAttribute(m_mediaValues->devicePixelRatio(), m_sourceSize, m_srcsetAttributeValue);
                 setUrlToLoad(bestFitSourceForImageAttributes(m_mediaValues->devicePixelRatio(), m_sourceSize, m_imgSrcUrl, m_srcsetImageCandidate), AllowURLReplacement);
+            } else {
+                m_resourceWidth = m_sourceSize;
             }
         }
     }
@@ -373,6 +376,7 @@ private:
     String m_srcsetAttributeValue;
     unsigned m_sourceSize;
     bool m_sourceSizeSet;
+    int m_resourceWidth;
     bool m_isCORSEnabled;
     FetchRequest::DeferOption m_defer;
     StoredCredentials m_allowCredentials;