Web MIDI: add assign() and equals() to WebMIDIPermissionRequest

public/web/WebMIDIPermissionRequest.h

Index: public/web/WebMIDIPermissionRequest.h
diff --git a/public/web/WebMIDIPermissionRequest.h b/public/web/WebMIDIPermissionRequest.h
index c6c2d9d4f31501fecb454e2593112a44644770a9..e451cd624e1993b0748a58c424902fb51b8db348 100644
--- a/public/web/WebMIDIPermissionRequest.h
+++ b/public/web/WebMIDIPermissionRequest.h
@@ -49,9 +49,14 @@ class WebSecurityOrigin;
 // WebMIDIClient::cancelPermissionRequest (request canceled).
 class WebMIDIPermissionRequest {
 public:
+    WebMIDIPermissionRequest(const WebMIDIPermissionRequest& o) { assign(o); }
+
     WEBKIT_EXPORT WebSecurityOrigin securityOrigin() const;
     WEBKIT_EXPORT void setIsAllowed(bool);
 
+    WEBKIT_EXPORT void assign(const WebMIDIPermissionRequest&);
+    WEBKIT_EXPORT bool equals(const WebMIDIPermissionRequest&) const;
+
 #if WEBKIT_IMPLEMENTATION
     explicit WebMIDIPermissionRequest(const PassRefPtr<WebCore::MIDIAccess>&);
     explicit WebMIDIPermissionRequest(WebCore::MIDIAccess*);
@@ -61,6 +66,16 @@ private:
     WebPrivatePtr<WebCore::MIDIAccess> m_private;
 };
 
+inline bool operator==(const WebMIDIPermissionRequest& a, const WebMIDIPermissionRequest& b)
+{
+    return a.equals(b);
+}
+
+inline bool operator!=(const WebMIDIPermissionRequest& a, const WebMIDIPermissionRequest& b)
+{
+    return !(a == b);
+}
+
 } // namespace WebKit
 
 #endif // WebMIDIPermissionRequest_h