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

Source/core/css/resolver/StyleResolver.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 201 matching lines @@
     newProperties.whitelistType = propertyWhitelistType;
     matchedRules.append(rule);
 }
 
 StyleResolver::StyleResolver(Document* document, bool matchAuthorAndUserStyles)
     : m_matchedPropertiesCacheAdditionsSinceLastSweep(0)
     , m_matchedPropertiesCacheSweepTimer(this, &StyleResolver::sweepMatchedPropertiesCache)
     , m_document(document)
     , m_matchAuthorAndUserStyles(matchAuthorAndUserStyles)
     , m_fontSelector(CSSFontSelector::create(document))
-#if ENABLE(CSS_DEVICE_ADAPTATION)
     , m_viewportStyleResolver(ViewportStyleResolver::create(document))
-#endif
     , m_styleBuilder(DeprecatedStyleBuilder::sharedStyleBuilder())
     , m_styleMap(this)
 {
     Element* root = document->documentElement();
 
     CSSDefaultStyleSheets::initDefaultStyle(root);
 
     // construct document root element default style. this is needed
     // to evaluate media queries that contain relative constraints, like "screen and (max-width: 10em)"
     // This is here instead of constructor, because when constructor is run,
@@ skipping 52 matching lines @@
         lastUpdatedResolver = resolver;
     }
 
     if (lastUpdatedResolver)
         lastUpdatedResolver->postAddRulesFromSheet();
     collectFeatures();
 
     if (document()->renderer() && document()->renderer()->style())
         document()->renderer()->style()->font().update(fontSelector());
 
-#if ENABLE(CSS_DEVICE_ADAPTATION)
-    viewportStyleResolver()->resolve();
-#endif
+    if (RuntimeEnabledFeatures::cssViewportEnabled())
+        viewportStyleResolver()->resolve();
 }
 
 void StyleResolver::resetAuthorStyle()
 {
     m_styleTree.clear();
 }
 
 static PassOwnPtr<RuleSet> makeRuleSet(const Vector<RuleFeature>& rules)
 {
     size_t size = rules.size();
@@ skipping 58 matching lines @@
 // This is a simplified style setting function for keyframe styles
 void StyleResolver::addKeyframeStyle(PassRefPtr<StyleRuleKeyframes> rule)
 {
     AtomicString s(rule->name());
     m_keyframesRuleMap.set(s.impl(), rule);
 }
 
 StyleResolver::~StyleResolver()
 {
     m_fontSelector->clearDocument();
-
-#if ENABLE(CSS_DEVICE_ADAPTATION)
     m_viewportStyleResolver->clearDocument();
-#endif
 }
 
 void StyleResolver::sweepMatchedPropertiesCache(Timer<StyleResolver>*)
 {
     // Look for cache entries containing a style declaration with a single ref and remove them.
     // This may happen when an element attribute mutation causes it to generate a new inlineStyle()
     // or presentationAttributeStyle(), potentially leaving this cache with the last ref on the old one.
     Vector<unsigned, 16> toRemove;
     MatchedPropertiesCache::iterator it = m_matchedPropertiesCache.begin();
     MatchedPropertiesCache::iterator end = m_matchedPropertiesCache.end();
@@ skipping 2923 matching lines @@
     case CSSPropertyWebkitShapeInside:
     case CSSPropertyWebkitShapeOutside:
     case CSSPropertyWhiteSpace:
     case CSSPropertyWidows:
     case CSSPropertyWidth:
     case CSSPropertyWordBreak:
     case CSSPropertyWordSpacing:
     case CSSPropertyWordWrap:
     case CSSPropertyZIndex:
     case CSSPropertyZoom:
-#if ENABLE(CSS_DEVICE_ADAPTATION)
     case CSSPropertyMaxZoom:
     case CSSPropertyMinZoom:
     case CSSPropertyOrientation:
     case CSSPropertyUserZoom:
-#endif
         ASSERT_NOT_REACHED();
         return;
     default:
         // Try the SVG properties
         applySVGProperty(id, value);
         return;
     }
 }
 
 PassRefPtr<StyleImage> StyleResolver::styleImage(CSSPropertyID property, CSSValue* value)
@@ skipping 398 matching lines @@
     info.addMember(m_state, "state");
 
     // FIXME: move this to a place where it would be called only once?
     info.addMember(CSSDefaultStyleSheets::defaultStyle, "defaultStyle");
     info.addMember(CSSDefaultStyleSheets::defaultQuirksStyle, "defaultQuirksStyle");
     info.addMember(CSSDefaultStyleSheets::defaultPrintStyle, "defaultPrintStyle");
     info.addMember(CSSDefaultStyleSheets::defaultViewSourceStyle, "defaultViewSourceStyle");
 }
 
 } // namespace WebCore