Enable float source size

Source/core/css/parser/SizesAttributeParserTest.cpp

Index: Source/core/css/parser/SizesAttributeParserTest.cpp
diff --git a/Source/core/css/parser/SizesAttributeParserTest.cpp b/Source/core/css/parser/SizesAttributeParserTest.cpp
index 834e1303d90c3240f97910694f1b75ae36ec40c9..5feadb5c17556c57f2218e7de74c3d6c0d86c817 100644
--- a/Source/core/css/parser/SizesAttributeParserTest.cpp
+++ b/Source/core/css/parser/SizesAttributeParserTest.cpp
@@ -14,7 +14,7 @@ namespace blink {
 
 typedef struct {
     const char* input;
-    const unsigned effectiveSize;
+    const float effectiveSize;
     const bool viewportDependant;
 } TestCase;
 
@@ -68,6 +68,7 @@ TEST(SizesAttributeParserTest, Basic)
         {"{{},1px", 500, true},
         {"[[],1px", 500, true},
         {"x(x(),1px", 500, true},
+        {"(max-width: 3000px) 50.5px, 40vw", 50.5, false},
         {0, 0, false} // Do not remove the terminator line.
     };