Oilpan: Remove most WillBe types from the code base

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

Index: third_party/WebKit/Source/core/dom/DocumentType.cpp
diff --git a/third_party/WebKit/Source/core/dom/DocumentType.cpp b/third_party/WebKit/Source/core/dom/DocumentType.cpp
index 6055c7c61a58caea7a395a590d59b6a349de9360..ffdc10a6041b9bfc0b54157a0263271f961bb449 100644
--- a/third_party/WebKit/Source/core/dom/DocumentType.cpp
+++ b/third_party/WebKit/Source/core/dom/DocumentType.cpp
@@ -45,7 +45,7 @@ Node::NodeType DocumentType::nodeType() const
     return DOCUMENT_TYPE_NODE;
 }
 
-PassRefPtrWillBeRawPtr<Node> DocumentType::cloneNode(bool /*deep*/)
+RawPtr<Node> DocumentType::cloneNode(bool /*deep*/)
 {
     return create(&document(), m_name, m_publicId, m_systemId);
 }