Oilpan: add transition types to FileSystem APIs.

Source/bindings/v8/SerializedScriptValue.cpp

Index: Source/bindings/v8/SerializedScriptValue.cpp
diff --git a/Source/bindings/v8/SerializedScriptValue.cpp b/Source/bindings/v8/SerializedScriptValue.cpp
index eecb2ba77a0fa2ec2ed27c4e42fe7889cd0eb39e..f74f462fe7421a1f5396cefb9f3b719c1e5c2bef 100644
--- a/Source/bindings/v8/SerializedScriptValue.cpp
+++ b/Source/bindings/v8/SerializedScriptValue.cpp
@@ -1877,7 +1877,7 @@ private:
             return false;
         if (!readWebCoreString(&url))
             return false;
-        RefPtr<DOMFileSystem> fs = DOMFileSystem::create(currentExecutionContext(m_isolate), name, static_cast<WebCore::FileSystemType>(type), KURL(ParsedURLString, url));
+        RefPtrWillBeRawPtr<DOMFileSystem> fs = DOMFileSystem::create(currentExecutionContext(m_isolate), name, static_cast<WebCore::FileSystemType>(type), KURL(ParsedURLString, url));
         *value = toV8(fs.release(), v8::Handle<v8::Object>(), m_isolate);
         return true;
     }