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

Source/core/dom/ViewportArguments.h

Index: Source/core/dom/ViewportArguments.h
diff --git a/Source/core/dom/ViewportArguments.h b/Source/core/dom/ViewportArguments.h
index ae3e94fd672977fe8f8b6e6b1bb5f83acea3ab26..0c21064a620f67f457bcdc6ee7afae55c2f89d42 100644
--- a/Source/core/dom/ViewportArguments.h
+++ b/Source/core/dom/ViewportArguments.h
@@ -36,30 +36,10 @@ namespace WebCore {
 
 class Document;
 
-enum ViewportErrorCode {
-    UnrecognizedViewportArgumentKeyError,
-    UnrecognizedViewportArgumentValueError,
-    TruncatedViewportArgumentValueError,
-    MaximumScaleTooLargeError,
-    TargetDensityDpiUnsupported
-};
-
 struct ViewportArguments {
 
-    enum Type {
-        // These are ordered in increasing importance.
-        Implicit,
-        XHTMLMobileProfile,
-        HandheldFriendlyMeta,
-        MobileOptimizedMeta,
-        ViewportMeta,
-        CSSDeviceAdaptation
-    } type;
-
     enum {
         ValueAuto = -1,
-        ValueDeviceWidth = -2,
-        ValueDeviceHeight = -3,
         ValuePortrait = -4,
         ValueLandscape = -5,
         ValueDeviceDPI = -6,
@@ -69,12 +49,9 @@ struct ViewportArguments {
         ValueExtendToZoom = -10
     };
 
-    ViewportArguments(Type type = Implicit)
-        : type(type)
-        , width(ValueAuto)
-        , minWidth(ValueAuto)
+    ViewportArguments()
+        : minWidth(ValueAuto)
         , maxWidth(ValueAuto)
-        , height(ValueAuto)
         , minHeight(ValueAuto)
         , maxHeight(ValueAuto)
         , zoom(ValueAuto)
@@ -86,13 +63,10 @@ struct ViewportArguments {
     {
     }
 
-    // All arguments are in CSS units.
-    PageScaleConstraints resolve(const FloatSize& initialViewportSize, int defaultWidth) const;
+    PageScaleConstraints resolve(const FloatSize& initialViewportSizeInCSSUnits) const;
 
-    float width;
     float minWidth;
     float maxWidth;
-    float height;
     float minHeight;
     float maxHeight;
     float zoom;
@@ -104,12 +78,8 @@ struct ViewportArguments {
 
     bool operator==(const ViewportArguments& other) const
     {
-        // Used for figuring out whether to reset the viewport or not,
-        // thus we are not taking type into account.
-        return width == other.width
-            && minWidth == other.minWidth
+        return minWidth == other.minWidth
             && maxWidth == other.maxWidth
-            && height == other.height
             && minHeight == other.minHeight
             && maxHeight == other.maxHeight
             && zoom == other.zoom
@@ -126,9 +96,6 @@ struct ViewportArguments {
     }
 };
 
-void setViewportFeature(const String& keyString, const String& valueString, Document*, void* data);
-void reportViewportWarning(Document*, ViewportErrorCode, const String& replacement1, const String& replacement2);
-
 } // namespace WebCore
 
 #endif // ViewportArguments_h