Remove MediaValues' dependency on RenderStyle

Source/core/css/MediaValues.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 MediaValues_h
 #define MediaValues_h
 
 #include "core/frame/LocalFrame.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
 class Document;
-class RenderStyle;
 class CSSPrimitiveValue;
 
 class MediaValues : public RefCounted<MediaValues> {
 public:
 
     enum MediaValuesMode {
         CachingMode,
         DynamicMode
     };
 
     enum PointerDeviceType {
         TouchPointer,
         MousePointer,
         NoPointer,
         UnknownPointer
     };
 
     virtual ~MediaValues() { }
 
+    static PassRefPtr<MediaValues> createDynamicIfFrameExists(LocalFrame*);
     virtual PassRefPtr<MediaValues> copy() const = 0;
     virtual bool isSafeToSendToAnotherThread() const = 0;
+    static bool computeLength(double value, unsigned short type, unsigned defaultFontSize, unsigned viewportWidth, unsigned viewportHeight, int& result);
     virtual bool computeLength(double value, unsigned short type, int& result) const = 0;
 
     virtual int viewportWidth() const = 0;
     virtual int viewportHeight() const = 0;
     virtual int deviceWidth() const = 0;
     virtual int deviceHeight() const = 0;
     virtual float devicePixelRatio() const = 0;
     virtual int colorBitsPerComponent() const = 0;
     virtual int monochromeBitsPerComponent() const = 0;
     virtual PointerDeviceType pointer() const = 0;
     virtual bool threeDEnabled() const = 0;
     virtual bool scanMediaType() const = 0;
     virtual bool screenMediaType() const = 0;
     virtual bool printMediaType() const = 0;
     virtual bool strictMode() const = 0;
     virtual Document* document() const = 0;
     virtual bool hasValues() const = 0;
 
 protected:
-    static Document* getExecutingDocument(Document&);
-
     int calculateViewportWidth(LocalFrame*) const;
     int calculateViewportHeight(LocalFrame*) const;
     int calculateDeviceWidth(LocalFrame*) const;
     int calculateDeviceHeight(LocalFrame*) const;
     bool calculateStrictMode(LocalFrame*) const;
     float calculateDevicePixelRatio(LocalFrame*) const;
     int calculateColorBitsPerComponent(LocalFrame*) const;
     int calculateMonochromeBitsPerComponent(LocalFrame*) const;
-    int calculateDefaultFontSize(RenderStyle*) const;
-    int calculateComputedFontSize(RenderStyle*) const;
-    bool calculateHasXHeight(RenderStyle*) const;
-    double calculateXHeight(RenderStyle*) const;
-    double calculateZeroWidth(RenderStyle*) const;
+    int calculateDefaultFontSize(LocalFrame*) const;
     bool calculateScanMediaType(LocalFrame*) const;
     bool calculateScreenMediaType(LocalFrame*) const;
     bool calculatePrintMediaType(LocalFrame*) const;
     bool calculateThreeDEnabled(LocalFrame*) const;
-    float calculateEffectiveZoom(RenderStyle*) const;
     MediaValues::PointerDeviceType calculateLeastCapablePrimaryPointerDeviceType(LocalFrame*) const;
 
 };
 
 } // namespace
 
 #endif // MediaValues_h