Oilpan: add transition types to FileSystem APIs.

Source/modules/filesystem/FileEntry.cpp

Index: Source/modules/filesystem/FileEntry.cpp
diff --git a/Source/modules/filesystem/FileEntry.cpp b/Source/modules/filesystem/FileEntry.cpp
index 082953cf4a637453cb6d27e7d3612dca390487c1..2d7978367ba82c9bc7c1edd8b0ec5f87cb54a220 100644
--- a/Source/modules/filesystem/FileEntry.cpp
+++ b/Source/modules/filesystem/FileEntry.cpp
@@ -39,7 +39,7 @@
 
 namespace WebCore {
 
-FileEntry::FileEntry(PassRefPtr<DOMFileSystemBase> fileSystem, const String& fullPath)
+FileEntry::FileEntry(PassRefPtrWillBeRawPtr<DOMFileSystemBase> fileSystem, const String& fullPath)
     : Entry(fileSystem, fullPath)
 {
     ScriptWrappable::init(this);
@@ -55,4 +55,9 @@ void FileEntry::file(PassOwnPtr<FileCallback> successCallback, PassOwnPtr<ErrorC
     filesystem()->createFile(this, successCallback, errorCallback);
 }
 
+void FileEntry::trace(Visitor* visitor)
+{
+    Entry::trace(visitor);
+}
+
 } // namespace