Move the CSS Device Adaptation @viewport rule support behind a runtime flag

Source/core/css/StyleRule.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2006, 2008, 2012, 2013 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 30 matching lines @@
         Unknown, // Not used.
         Style,
         Charset, // Not used. These are internally strings owned by the style sheet.
         Import,
         Media,
         FontFace,
         Page,
         Keyframes,
         Keyframe, // Not used. These are internally non-rule StyleKeyframe objects.
         Supports = 12,
-#if ENABLE(CSS_DEVICE_ADAPTATION)
         Viewport = 15,
-#endif
         Region = 16,
         Filter = 17,
         HostInternal = 18, // Spec says Host = 1001, but we can use only 5 bit for type().
     };
 
     Type type() const { return static_cast<Type>(m_type); }
-    
+
     bool isCharsetRule() const { return type() == Charset; }
     bool isFontFaceRule() const { return type() == FontFace; }
     bool isKeyframesRule() const { return type() == Keyframes; }
     bool isMediaRule() const { return type() == Media; }
     bool isPageRule() const { return type() == Page; }
     bool isStyleRule() const { return type() == Style; }
     bool isRegionRule() const { return type() == Region; }
     bool isSupportsRule() const { return type() == Supports; }
-#if ENABLE(CSS_DEVICE_ADAPTATION)
     bool isViewportRule() const { return type() == Viewport; }
-#endif
     bool isImportRule() const { return type() == Import; }
     bool isHostRule() const { return type() == HostInternal; }
     bool isFilterRule() const { return type() == Filter; }
 
     PassRefPtr<StyleRuleBase> copy() const;
 
     int sourceLine() const { return m_sourceLine; }
 
     void deref()
     {
@@ skipping 187 matching lines @@
         return adoptRef(new StyleRuleHost(adoptRules));
     }
 
     PassRefPtr<StyleRuleHost> copy() const { return adoptRef(new StyleRuleHost(*this)); }
 
 private:
     StyleRuleHost(Vector<RefPtr<StyleRuleBase> >& adoptRules) : StyleRuleGroup(HostInternal, adoptRules) { }
     StyleRuleHost(const StyleRuleHost& o) : StyleRuleGroup(o) { }
 };
 
-#if ENABLE(CSS_DEVICE_ADAPTATION)
 class StyleRuleViewport : public StyleRuleBase {
 public:
     static PassRefPtr<StyleRuleViewport> create() { return adoptRef(new StyleRuleViewport); }
 
     ~StyleRuleViewport();
 
     const StylePropertySet* properties() const { return m_properties.get(); }
     MutableStylePropertySet* mutableProperties();
 
     void setProperties(PassRefPtr<StylePropertySet>);
 
     PassRefPtr<StyleRuleViewport> copy() const { return adoptRef(new StyleRuleViewport(*this)); }
 
     void reportDescendantMemoryUsage(MemoryObjectInfo*) const;
 
 private:
     StyleRuleViewport();
     StyleRuleViewport(const StyleRuleViewport&);
 
     RefPtr<StylePropertySet> m_properties;
 };
-#endif // ENABLE(CSS_DEVICE_ADAPTATION)
 
 inline const StyleRuleMedia* toStyleRuleMedia(const StyleRuleGroup* rule)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!rule || rule->isMediaRule());
     return static_cast<const StyleRuleMedia*>(rule);
 }
 
 inline const StyleRuleSupports* toStyleRuleSupports(const StyleRuleGroup* rule)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!rule || rule->isSupportsRule());
@@ skipping 27 matching lines @@
     StyleRuleFilter(const String&);
     StyleRuleFilter(const StyleRuleFilter&);
 
     String m_filterName;
     RefPtr<StylePropertySet> m_properties;
 };
 
 } // namespace WebCore
 
 #endif // StyleRule_h