Translate viewport related meta tags into @viewport descriptors as suggested by the CSS Device Adap…

Source/core/dom/Document.h

Index: Source/core/dom/Document.h
diff --git a/Source/core/dom/Document.h b/Source/core/dom/Document.h
index 3299ae2c2e6f41e706870c47892a3ecf2a9413d8..bbaec2aeedcdf85aa934d38c4887dc19d2f89732 100644
--- a/Source/core/dom/Document.h
+++ b/Source/core/dom/Document.h
@@ -409,6 +409,8 @@ public:
     bool isPluginDocument() const { return m_documentClasses & PluginDocumentClass; }
     bool isMediaDocument() const { return m_documentClasses & MediaDocumentClass; }
 
+    bool isXHTMLMobileProfile() const;
+
     bool hasSVGRootNode() const;
 
     bool isFrameSet() const;
@@ -739,7 +741,6 @@ public:
      * @param content The header value (value of the meta tag's "content" attribute)
      */
     void processHttpEquiv(const String& equiv, const String& content);
-    void processViewport(const String& features, ViewportArguments::Type origin);
     void updateViewportArguments();
     void processReferrerPolicy(const String& policy);
 
@@ -1062,9 +1063,6 @@ private:
 
     void detachParser();
 
-    typedef void (*ArgumentsCallback)(const String& keyString, const String& valueString, Document*, void* data);
-    void processArguments(const String& features, void* data, ArgumentsCallback);
-
     virtual bool isDocument() const OVERRIDE { return true; }
 
     virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0);