[Oilpan]: Move StyleKeyFrame to the oilpan heap using transition types.

Source/core/css/CSSKeyframesRule.cpp

Index: Source/core/css/CSSKeyframesRule.cpp
diff --git a/Source/core/css/CSSKeyframesRule.cpp b/Source/core/css/CSSKeyframesRule.cpp
index 9029c65f81c88537f512f3747eaeab38fad00826..cd78e79f272744dda479ed98157f445c3db20c00 100644
--- a/Source/core/css/CSSKeyframesRule.cpp
+++ b/Source/core/css/CSSKeyframesRule.cpp
@@ -52,14 +52,14 @@ StyleRuleKeyframes::~StyleRuleKeyframes()
 {
 }
 
-void StyleRuleKeyframes::parserAppendKeyframe(PassRefPtr<StyleKeyframe> keyframe)
+void StyleRuleKeyframes::parserAppendKeyframe(PassRefPtrWillBeRawPtr<StyleKeyframe> keyframe)
 {
     if (!keyframe)
         return;
     m_keyframes.append(keyframe);
 }
 
-void StyleRuleKeyframes::wrapperAppendKeyframe(PassRefPtr<StyleKeyframe> keyframe)
+void StyleRuleKeyframes::wrapperAppendKeyframe(PassRefPtrWillBeRawPtr<StyleKeyframe> keyframe)
 {
     m_keyframes.append(keyframe);
 }
@@ -86,6 +86,12 @@ int StyleRuleKeyframes::findKeyframeIndex(const String& key) const
     return -1;
 }
 
+void StyleRuleKeyframes::traceAfterDispatch(Visitor* visitor)
+{
+    visitor->trace(m_keyframes);
+    StyleRuleBase::traceAfterDispatch(visitor);
+}
+
 CSSKeyframesRule::CSSKeyframesRule(StyleRuleKeyframes* keyframesRule, CSSStyleSheet* parent)
     : CSSRule(parent)
     , m_keyframesRule(keyframesRule)
@@ -119,7 +125,7 @@ void CSSKeyframesRule::insertRule(const String& ruleText)
     CSSStyleSheet* styleSheet = parentStyleSheet();
     CSSParserContext context(parserContext(), UseCounter::getFrom(styleSheet));
     BisonCSSParser parser(context);
-    RefPtr<StyleKeyframe> keyframe = parser.parseKeyframeRule(styleSheet ? styleSheet->contents() : 0, ruleText);
+    RefPtrWillBeRawPtr<StyleKeyframe> keyframe = parser.parseKeyframeRule(styleSheet ? styleSheet->contents() : 0, ruleText);
     if (!keyframe)
         return;