[Oilpan] Prepare full definition of classes before using Member

third_party/WebKit/Source/core/css/CSSStyleSheet.h

Index: third_party/WebKit/Source/core/css/CSSStyleSheet.h
diff --git a/third_party/WebKit/Source/core/css/CSSStyleSheet.h b/third_party/WebKit/Source/core/css/CSSStyleSheet.h
index 0f8ebc925c4136fc2ce7e113abb4d7a6cde8103f..d055abac8553a83d14f5db33fc31cfc1252da99e 100644
--- a/third_party/WebKit/Source/core/css/CSSStyleSheet.h
+++ b/third_party/WebKit/Source/core/css/CSSStyleSheet.h
@@ -86,7 +86,7 @@ public:
 
     void clearOwnerRule() { m_ownerRule = nullptr; }
     Document* ownerDocument() const;
-    MediaQuerySet* mediaQueries() const { return m_mediaQueries.get(); }
+    MediaQuerySet* mediaQueries() const;
     void setMediaQueries(PassRefPtrWillBeRawPtr<MediaQuerySet>);
     void setTitle(const String& title) { m_title = title; }
     // Set by LinkStyle iff CORS-enabled fetch of stylesheet succeeded from this origin.
@@ -110,7 +110,7 @@ public:
 
     void clearChildRuleCSSOMWrappers();
 
-    StyleSheetContents* contents() const { return m_contents.get(); }
+    StyleSheetContents* contents() const;
 
     bool isInline() const { return m_isInlineStylesheet; }
     TextPosition startPositionInSource() const { return m_startPosition; }