Avoid rounding down viewport dimensions in Media Queries

third_party/WebKit/Source/core/css/MediaQueryEvaluator.cpp

 /*
  * CSS Media Query Evaluator
  *
  * Copyright (C) 2006 Kimmo Kinnunen <kimmo.t.kinnunen@nokia.com>.
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ skipping 375 matching lines @@
     if (value.isValid())
         return computeLengthAndCompare(value, op, mediaValues, mediaValues.deviceWidth());
 
     // ({,min-,max-}device-width)
     // assume if we have a device, assume non-zero
     return true;
 }
 
 static bool heightMediaFeatureEval(const MediaQueryExpValue& value, MediaFeaturePrefix op, const MediaValues& mediaValues)
 {
-    int height = mediaValues.viewportHeight();
+    double height = mediaValues.viewportHeight();
     if (value.isValid())
         return computeLengthAndCompare(value, op, mediaValues, height);
 
     return height;
 }
 
 static bool widthMediaFeatureEval(const MediaQueryExpValue& value, MediaFeaturePrefix op, const MediaValues& mediaValues)
 {
-    int width = mediaValues.viewportWidth();
+    double width = mediaValues.viewportWidth();
     if (value.isValid())
         return computeLengthAndCompare(value, op, mediaValues, width);
 
     return width;
 }
 
 // Rest of the functions are trampolines which set the prefix according to the media feature expression used.
 
 static bool minColorMediaFeatureEval(const MediaQueryExpValue& value, MediaFeaturePrefix, const MediaValues& mediaValues)
 {
@@ skipping 243 matching lines @@
     // Call the media feature evaluation function. Assume no prefix and let
     // trampoline functions override the prefix if prefix is used.
     EvalFunc func = gFunctionMap->get(expr->mediaFeature().impl());
     if (func)
         return func(expr->expValue(), NoPrefix, *m_mediaValues);
 
     return false;
 }
 
 } // namespace