Revert of [Oilpan] Prepare full definition of classes before using Member

third_party/WebKit/Source/core/dom/TreeScope.cpp

Index: third_party/WebKit/Source/core/dom/TreeScope.cpp
diff --git a/third_party/WebKit/Source/core/dom/TreeScope.cpp b/third_party/WebKit/Source/core/dom/TreeScope.cpp
index 921c286d236aa359119073506478150c08cd6154..fe8f2ff9f4158bc2e2c17573f1389aacf4d19d1b 100644
--- a/third_party/WebKit/Source/core/dom/TreeScope.cpp
+++ b/third_party/WebKit/Source/core/dom/TreeScope.cpp
@@ -132,11 +132,6 @@ void TreeScope::destroyTreeScopeData()
 }
 #endif
 
-void TreeScope::setDocument(Document& document)
-{
-    m_document = &document;
-}
-
 void TreeScope::setParentTreeScope(TreeScope& newParentScope)
 {
     // A document node cannot be re-parented.
@@ -151,11 +146,6 @@ void TreeScope::setParentTreeScope(TreeScope& newParentScope)
     setDocument(newParentScope.document());
 }
 
-ScopedStyleResolver* TreeScope::scopedStyleResolver() const
-{
-    return m_scopedStyleResolver.get();
-}
-
 ScopedStyleResolver& TreeScope::ensureScopedStyleResolver()
 {
     RELEASE_ASSERT(this);
@@ -204,12 +194,6 @@ void TreeScope::removeElementById(const AtomicString& elementId, Element* elemen
     m_idTargetObserverRegistry->notifyObservers(elementId);
 }
 
-Document& TreeScope::document() const
-{
-    ASSERT(m_document);
-    return *m_document;
-}
-
 Node* TreeScope::ancestorInThisScope(Node* node) const
 {
     while (node) {
@@ -435,11 +419,6 @@ void TreeScope::adoptIfNeeded(Node& node)
         adopter.execute();
 }
 
-IdTargetObserverRegistry& TreeScope::idTargetObserverRegistry() const
-{
-    return *m_idTargetObserverRegistry.get();
-}
-
 Element* TreeScope::adjustedFocusedElement() const
 {
     Document& document = rootNode().document();