Avoid rounding down viewport dimensions in Media Queries

third_party/WebKit/Source/core/css/MediaValuesCached.h

 // 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.
 
 #ifndef MediaValuesCached_h
 #define MediaValuesCached_h
 
 #include "core/CoreExport.h"
 #include "core/css/MediaValues.h"
 
 namespace blink {
 
 class CORE_EXPORT MediaValuesCached final : public MediaValues {
 public:
     struct MediaValuesCachedData {
         DISALLOW_NEW();
         // Members variables must be thread safe, since they're copied to the parser thread
-        int viewportWidth;
-        int viewportHeight;
+        double viewportWidth;
+        double viewportHeight;
         int deviceWidth;
         int deviceHeight;
         float devicePixelRatio;
         int colorBitsPerComponent;
         int monochromeBitsPerComponent;
         PointerType primaryPointerType;
         int availablePointerTypes;
         HoverType primaryHoverType;
         int availableHoverTypes;
         int defaultFontSize;
@@ skipping 24 matching lines @@
 
     static PassRefPtrWillBeRawPtr<MediaValues> create();
     static PassRefPtrWillBeRawPtr<MediaValues> create(Document&);
     static PassRefPtrWillBeRawPtr<MediaValues> create(LocalFrame*);
     static PassRefPtrWillBeRawPtr<MediaValues> create(MediaValuesCachedData&);
     PassRefPtrWillBeRawPtr<MediaValues> copy() const override;
     bool isSafeToSendToAnotherThread() const override;
     bool computeLength(double value, CSSPrimitiveValue::UnitType, int& result) const override;
     bool computeLength(double value, CSSPrimitiveValue::UnitType, double& result) const override;
 
-    int viewportWidth() const override;
-    int viewportHeight() const override;
+    double viewportWidth() const override;
+    double viewportHeight() const override;
     int deviceWidth() const override;
     int deviceHeight() const override;
     float devicePixelRatio() const override;
     int colorBitsPerComponent() const override;
     int monochromeBitsPerComponent() const override;
     PointerType primaryPointerType() const override;
     int availablePointerTypes() const override;
     HoverType primaryHoverType() const override;
     int availableHoverTypes() const override;
     bool threeDEnabled() const override;
     bool strictMode() const override;
     Document* document() const override;
     bool hasValues() const override;
     const String mediaType() const override;
     WebDisplayMode displayMode() const override;
 
-    void setViewportWidth(int);
-    void setViewportHeight(int);
+    void setViewportWidth(double);
+    void setViewportHeight(double);
 
     bool isCached() const override { return true; }
 protected:
     MediaValuesCached();
     MediaValuesCached(LocalFrame*);
     MediaValuesCached(const MediaValuesCachedData&);
 
     MediaValuesCachedData m_data;
 };
 
 } // namespace
 
 #endif // MediaValuesCached_h