Add support for media attribute on link

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

Index: third_party/WebKit/Source/core/css/MediaValuesDynamic.h
diff --git a/third_party/WebKit/Source/core/css/MediaValuesDynamic.h b/third_party/WebKit/Source/core/css/MediaValuesDynamic.h
index b45df1ee8a8efc5877abfd87d272599743e4d1e2..c6d2d9eedc89e20b4c50d18f7527379e824047a2 100644
--- a/third_party/WebKit/Source/core/css/MediaValuesDynamic.h
+++ b/third_party/WebKit/Source/core/css/MediaValuesDynamic.h
@@ -36,15 +36,20 @@ public:
     WebDisplayMode displayMode() const override;
     Document* document() const override;
     bool hasValues() const override;
+    void overrideViewportDimensions(double width, double height) override;
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     MediaValuesDynamic(LocalFrame*);
+    MediaValuesDynamic(LocalFrame*, bool overriddenViewportDimensions, double viewportWidth, double viewportHeight);
 
     // This raw ptr is safe, as MediaValues would not outlive MediaQueryEvaluator, and
     // MediaQueryEvaluator is reset on |Document::detach|.
     RawPtrWillBeMember<LocalFrame> m_frame;
+    bool m_viewportDimensionsOverridden;
+    double m_viewportWidthOverride;
+    double m_viewportHeightOverride;
 };
 
 } // namespace blink