[VR, Permission] Use appopriate type parameters for WebCallbacks (3/3)

public/platform/modules/vr/WebVRClient.h

Index: public/platform/modules/vr/WebVRClient.h
diff --git a/public/platform/modules/vr/WebVRClient.h b/public/platform/modules/vr/WebVRClient.h
index 65aaa8d71076506b3194ecd838c3cd7d7194f173..6de79d994e4b5628b08fec1c4944c8adfe9ee8a7 100644
--- a/public/platform/modules/vr/WebVRClient.h
+++ b/public/platform/modules/vr/WebVRClient.h
@@ -12,11 +12,7 @@
 namespace blink {
 
 // Success and failure callbacks for getDevices.
-class WebVRGetDevicesCallback : public WebCallbacks<const WebVector<WebVRDevice>&, void> {
-public:
-    virtual void onSuccess(const WebVector<WebVRDevice>&) = 0;
-    void onSuccess(WebVector<WebVRDevice>* r) { onSuccess(*r); }
-};
+using WebVRGetDevicesCallback = WebCallbacks<const WebVector<WebVRDevice>&, void>;
 
 // Client handling VR device communication for a given WebFrame.
 class WebVRClient {