Floating point MQs should not match.

Source/core/css/parser/SizesCalcParser.cpp

Index: Source/core/css/parser/SizesCalcParser.cpp
diff --git a/Source/core/css/parser/SizesCalcParser.cpp b/Source/core/css/parser/SizesCalcParser.cpp
index 7265554e0d10d5e55c05a9b51f9c6930bcb01b82..3c65f92dd81ded1e20c5481516c015dc6262a560 100644
--- a/Source/core/css/parser/SizesCalcParser.cpp
+++ b/Source/core/css/parser/SizesCalcParser.cpp
@@ -70,7 +70,7 @@ void SizesCalcParser::appendNumber(const MediaQueryToken& token)
 bool SizesCalcParser::appendLength(const MediaQueryToken& token)
 {
     SizesCalcValue value;
-    double result = 0;
+    float result = 0;
     if (!m_mediaValues->computeLength(token.numericValue(), token.unitType(), result))
         return false;
     value.value = result;

[rune, 2014/10/10 12:46:04]

Now you're taking a double (numericValue()), converts it into a float, and then
back into a double value (value.value). I don't think that makes sense.