Make WebFileSystemCallbacks not self-destruct, deprecate AsyncFileSystem

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 5a0c0d8551b14ff1668f7cdff18f97bf1f771b5f..ec002b021986bfe79dac6c84f6b56cc94d9631d7 100644
--- a/Source/bindings/v8/SerializedScriptValue.cpp
+++ b/Source/bindings/v8/SerializedScriptValue.cpp
@@ -1880,7 +1880,7 @@ private:
             return false;
         if (!readWebCoreString(&url))
             return false;
-        RefPtr<DOMFileSystem> fs = DOMFileSystem::create(getScriptExecutionContext(), name, static_cast<WebCore::FileSystemType>(type), KURL(ParsedURLString, url), AsyncFileSystem::create());
+        RefPtr<DOMFileSystem> fs = DOMFileSystem::create(getScriptExecutionContext(), name, static_cast<WebCore::FileSystemType>(type), KURL(ParsedURLString, url));
         *value = toV8(fs.release(), v8::Handle<v8::Object>(), m_isolate);
         return true;
     }