Turned m_sourceSize in preloadScanner to a float.

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..16607134a3acb3d091721e8515031c8ee8c105b4 100644
--- a/Source/core/html/parser/HTMLPreloadScanner.cpp
+++ b/Source/core/html/parser/HTMLPreloadScanner.cpp
@@ -371,7 +371,7 @@ private:
     bool m_inputIsImage;
     String m_imgSrcUrl;
     String m_srcsetAttributeValue;
-    unsigned m_sourceSize;
+    float m_sourceSize;
     bool m_sourceSizeSet;
     bool m_isCORSEnabled;
     FetchRequest::DeferOption m_defer;