Upstream version 10.39.225.0

[platform/framework/web/crosswalk.git] / src / third_party / WebKit / Source / modules / webmidi / MIDIErrorCallback.h

diff --git a/src/third_party/WebKit/Source/modules/webmidi/MIDIErrorCallback.h b/src/third_party/WebKit/Source/modules/webmidi/MIDIErrorCallback.h
index b528ffd..827e7ee 100644 (file)
--- a/src/third_party/WebKit/Source/modules/webmidi/MIDIErrorCallback.h
+++ b/src/third_party/WebKit/Source/modules/webmidi/MIDIErrorCallback.h
@@ -31,13 +31,16 @@
 #ifndef MIDIErrorCallback_h
 #define MIDIErrorCallback_h
 
+#include "platform/heap/Handle.h"
+
 namespace blink {
 
 class DOMError;
 
-class MIDIErrorCallback {
+class MIDIErrorCallback : public GarbageCollectedFinalized<MIDIErrorCallback> {
 public:
     virtual ~MIDIErrorCallback() { }
+    virtual void trace(Visitor*) { }
     virtual void handleEvent(DOMError*) = 0;
 };