Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/html/TextDocument.cpp

Index: third_party/WebKit/Source/core/html/TextDocument.cpp
diff --git a/third_party/WebKit/Source/core/html/TextDocument.cpp b/third_party/WebKit/Source/core/html/TextDocument.cpp
index 555840a7d461c704c4d76303a834874f8323e959..939bfb30375ff8762f57230d3d2300239cd37962 100644
--- a/third_party/WebKit/Source/core/html/TextDocument.cpp
+++ b/third_party/WebKit/Source/core/html/TextDocument.cpp
@@ -35,7 +35,7 @@ TextDocument::TextDocument(const DocumentInit& initializer)
     lockCompatibilityMode();
 }
 
-PassRefPtrWillBeRawPtr<DocumentParser> TextDocument::createParser()
+RawPtr<DocumentParser> TextDocument::createParser()
 {
     return TextDocumentParser::create(*this, parserSynchronizationPolicy());
 }