Floating point MQs should not match.

Source/core/css/parser/SizesCalcParser.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/css/parser/SizesCalcParser.h"
 
 #include "core/css/MediaValues.h"
 #include "core/css/parser/MediaQueryToken.h"
 
@@ skipping 52 matching lines @@
 void SizesCalcParser::appendNumber(const MediaQueryToken& token)
 {
     SizesCalcValue value;
     value.value = token.numericValue();
     m_valueList.append(value);
 }
 
 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.

     value.isLength = true;
     m_valueList.append(value);
     return true;
 }
 
 void SizesCalcParser::appendOperator(const MediaQueryToken& token)
 {
     SizesCalcValue value;
     value.operation = token.delimiter();
     m_valueList.append(value);
@@ skipping 125 matching lines @@
         }
     }
     if (stack.size() == 1 && stack.last().isLength) {
         m_result = std::max(clampTo<float>(stack.last().value), (float)0.0);
         return true;
     }
     return false;
 }
 
 } // namespace blink