Make CSSRuleSourceData use the CSSRule Type enum

Source/core/css/StyleRule.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2005, 2006, 2008, 2012 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 68 matching lines @@
         return;
     case Keyframe:
         toStyleRuleKeyframe(this)->traceAfterDispatch(visitor);
         return;
     case Namespace:
         toStyleRuleNamespace(this)->traceAfterDispatch(visitor);
         return;
     case Viewport:
         toStyleRuleViewport(this)->traceAfterDispatch(visitor);
         return;
+    case Unknown:
+        break;
     }
     ASSERT_NOT_REACHED();
 }
 
 void StyleRuleBase::finalizeGarbageCollectedObject()
 {
     switch (type()) {
     case Style:
         toStyleRule(this)->~StyleRule();
         return;
@@ skipping 17 matching lines @@
         return;
     case Keyframe:
         toStyleRuleKeyframe(this)->~StyleRuleKeyframe();
         return;
     case Namespace:
         toStyleRuleNamespace(this)->~StyleRuleNamespace();
         return;
     case Viewport:
         toStyleRuleViewport(this)->~StyleRuleViewport();
         return;
+    case Unknown:
+        return;
     }
     ASSERT_NOT_REACHED();
 }
 
 void StyleRuleBase::destroy()
 {
     switch (type()) {
     case Style:
         delete toStyleRule(this);
         return;
@@ skipping 17 matching lines @@
         return;
     case Keyframe:
         delete toStyleRuleKeyframe(this);
         return;
     case Namespace:
         delete toStyleRuleNamespace(this);
         return;
     case Viewport:
         delete toStyleRuleViewport(this);
         return;
+    case Unknown:
+        return;
     }
     ASSERT_NOT_REACHED();
 }
 
 PassRefPtrWillBeRawPtr<StyleRuleBase> StyleRuleBase::copy() const
 {
     switch (type()) {
     case Style:
         return toStyleRule(this)->copy();
     case Page:
         return toStyleRulePage(this)->copy();
     case FontFace:
         return toStyleRuleFontFace(this)->copy();
     case Media:
         return toStyleRuleMedia(this)->copy();
     case Supports:
         return toStyleRuleSupports(this)->copy();
     case Import:
         // FIXME: Copy import rules.
         ASSERT_NOT_REACHED();
         return nullptr;
     case Keyframes:
         return toStyleRuleKeyframes(this)->copy();
     case Viewport:
         return toStyleRuleViewport(this)->copy();
     case Keyframe:
     case Namespace:
+    case Unknown:
         ASSERT_NOT_REACHED();
         return nullptr;
     }
     ASSERT_NOT_REACHED();
     return nullptr;
 }
 
 PassRefPtrWillBeRawPtr<CSSRule> StyleRuleBase::createCSSOMWrapper(CSSStyleSheet* parentSheet, CSSRule* parentRule) const
 {
     RefPtrWillBeRawPtr<CSSRule> rule = nullptr;
@@ skipping 18 matching lines @@
         rule = CSSImportRule::create(toStyleRuleImport(self), parentSheet);
         break;
     case Keyframes:
         rule = CSSKeyframesRule::create(toStyleRuleKeyframes(self), parentSheet);
         break;
     case Viewport:
         rule = CSSViewportRule::create(toStyleRuleViewport(self), parentSheet);
         break;
     case Keyframe:
     case Namespace:
+    case Unknown:
         ASSERT_NOT_REACHED();
         return nullptr;
     }
     if (parentRule)
         rule->setParentRule(parentRule);
     return rule.release();
 }
 
 unsigned StyleRule::averageSizeInBytes()
 {
@@ skipping 191 matching lines @@
     m_properties = properties;
 }
 
 DEFINE_TRACE_AFTER_DISPATCH(StyleRuleViewport)
 {
     visitor->trace(m_properties);
     StyleRuleBase::traceAfterDispatch(visitor);
 }
 
 } // namespace blink