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

Source/core/page/PageScaleConstraintsSet.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 30 matching lines @@
 // the meta viewport tag and other sources.
 class PageScaleConstraintsSet {
 public:
     PageScaleConstraintsSet();
 
     PageScaleConstraints defaultConstraints() const;
 
     // Settings defined in the website's viewport tag, if viewport tag support
     // is enabled.
     const PageScaleConstraints& pageDefinedConstraints() const { return m_pageDefinedConstraints; }
-    void updatePageDefinedConstraints(const ViewportArguments&, IntSize viewSize, int layoutFallbackWidth);
+    void updatePageDefinedConstraints(const ViewportArguments&, IntSize viewSize);
     void adjustPageDefinedConstraintsForAndroidWebView(const ViewportArguments&, IntSize viewSize, int layoutFallbackWidth, float deviceScaleFactor, bool useWideViewport, bool loadWithOverviewMode);
 
     // Constraints may also be set from Chromium -- this overrides any
     // page-defined values.
     const PageScaleConstraints& userAgentConstraints() const { return m_userAgentConstraints; }
     void setUserAgentConstraints(const PageScaleConstraints&);
 
     // Actual computed values, taking into account the above plus the current
     // viewport size and document width.
     const PageScaleConstraints& finalConstraints() const { return m_finalConstraints; }
@@ skipping 17 matching lines @@
 
     int m_lastContentsWidth;
 
     bool m_needsReset;
     bool m_constraintsDirty;
 };
 
 } // namespace WebCore
 
 #endif // PageScaleConstraintsSet_h