[Oilpan] Prepare full definition of classes before using Member

third_party/WebKit/Source/core/css/StyleRuleImport.cpp

Index: third_party/WebKit/Source/core/css/StyleRuleImport.cpp
diff --git a/third_party/WebKit/Source/core/css/StyleRuleImport.cpp b/third_party/WebKit/Source/core/css/StyleRuleImport.cpp
index 90eddf9865c9e4aa0cd43e7bf959f789408ae4e2..5f597fea20f2376bd3d7644c7de2e305e36be3d6 100644
--- a/third_party/WebKit/Source/core/css/StyleRuleImport.cpp
+++ b/third_party/WebKit/Source/core/css/StyleRuleImport.cpp
@@ -68,6 +68,32 @@ DEFINE_TRACE_AFTER_DISPATCH(StyleRuleImport)
     StyleRuleBase::traceAfterDispatch(visitor);
 }
 
+StyleSheetContents* StyleRuleImport::parentStyleSheet() const
+{
+    return m_parentStyleSheet;
+}
+
+void StyleRuleImport::setParentStyleSheet(StyleSheetContents* sheet)
+{
+    ASSERT(sheet);
+    m_parentStyleSheet = sheet;
+}
+
+void StyleRuleImport::clearParentStyleSheet()
+{
+    m_parentStyleSheet = nullptr;
+}
+
+StyleSheetContents* StyleRuleImport::styleSheet() const
+{
+    return m_styleSheet.get();
+}
+
+MediaQuerySet* StyleRuleImport::mediaQueries() const
+{
+    return m_mediaQueries.get();
+}
+
 void StyleRuleImport::setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CSSStyleSheetResource* cachedStyleSheet)
 {
     if (m_styleSheet)