Oilpan: add transition types to FileSystem APIs.

Source/modules/filesystem/DOMFileSystemSync.h

Index: Source/modules/filesystem/DOMFileSystemSync.h
diff --git a/Source/modules/filesystem/DOMFileSystemSync.h b/Source/modules/filesystem/DOMFileSystemSync.h
index f98f751b94050acdee39b073e56a4930cb4b08fc..2547c2fc7d634d139e03e674a5ed12f8544ef5d7 100644
--- a/Source/modules/filesystem/DOMFileSystemSync.h
+++ b/Source/modules/filesystem/DOMFileSystemSync.h
@@ -45,21 +45,21 @@ class ExceptionState;
 
 class DOMFileSystemSync FINAL : public DOMFileSystemBase, public ScriptWrappable {
 public:
-    static PassRefPtr<DOMFileSystemSync> create(ExecutionContext* context, const String& name, FileSystemType type, const KURL& rootURL)
+    static PassRefPtrWillBeRawPtr<DOMFileSystemSync> create(ExecutionContext* context, const String& name, FileSystemType type, const KURL& rootURL)
     {
-        return adoptRef(new DOMFileSystemSync(context, name, type, rootURL));
+        return adoptRefWillBeRefCountedGarbageCollected(new DOMFileSystemSync(context, name, type, rootURL));
     }
 
-    static PassRefPtr<DOMFileSystemSync> create(DOMFileSystemBase*);
+    static PassRefPtrWillBeRawPtr<DOMFileSystemSync> create(DOMFileSystemBase*);
 
     virtual ~DOMFileSystemSync();
 
     virtual void reportError(PassOwnPtr<ErrorCallback>, PassRefPtrWillBeRawPtr<FileError>) OVERRIDE;
 
-    PassRefPtr<DirectoryEntrySync> root();
+    PassRefPtrWillBeRawPtr<DirectoryEntrySync> root();
 
     PassRefPtrWillBeRawPtr<File> createFile(const FileEntrySync*, ExceptionState&);
-    PassRefPtr<FileWriterSync> createWriter(const FileEntrySync*, ExceptionState&);
+    PassRefPtrWillBeRawPtr<FileWriterSync> createWriter(const FileEntrySync*, ExceptionState&);
 
 private:
     DOMFileSystemSync(ExecutionContext*, const String& name, FileSystemType, const KURL& rootURL);