Oilpan: add transition types to FileSystem APIs.

Source/modules/filesystem/DirectoryEntry.cpp

Index: Source/modules/filesystem/DirectoryEntry.cpp
diff --git a/Source/modules/filesystem/DirectoryEntry.cpp b/Source/modules/filesystem/DirectoryEntry.cpp
index d0ec7a7e4c66cfd17ce2f2356c36decc3a713345..84c446563a178e07067d5781e561b2eff740bf5d 100644
--- a/Source/modules/filesystem/DirectoryEntry.cpp
+++ b/Source/modules/filesystem/DirectoryEntry.cpp
@@ -39,13 +39,13 @@
 
 namespace WebCore {
 
-DirectoryEntry::DirectoryEntry(PassRefPtr<DOMFileSystemBase> fileSystem, const String& fullPath)
+DirectoryEntry::DirectoryEntry(PassRefPtrWillBeRawPtr<DOMFileSystemBase> fileSystem, const String& fullPath)
     : Entry(fileSystem, fullPath)
 {
     ScriptWrappable::init(this);
 }
 
-PassRefPtr<DirectoryReader> DirectoryEntry::createReader()
+PassRefPtrWillBeRawPtr<DirectoryReader> DirectoryEntry::createReader()
 {
     return DirectoryReader::create(m_fileSystem, m_fullPath);
 }
@@ -67,4 +67,9 @@ void DirectoryEntry::removeRecursively(PassOwnPtr<VoidCallback> successCallback,
     m_fileSystem->removeRecursively(this, successCallback, errorCallback);
 }
 
+void DirectoryEntry::trace(Visitor* visitor)
+{
+    Entry::trace(visitor);
+}
+
 }