Replace signals with Q_SIGNALS

src/lyrics/lyricsfetcher.h

@@ -59,7 +59,7 @@ class LyricsFetcher : public QObject {
  private:
   void AddRequest(const Request &request);
 
- signals:
+ Q_SIGNALS:
   void LyricsFetched(const quint64 request_id, const QString &provider, const QString &lyrics);
   void SearchFinished(const quint64 request_id, const LyricsSearchResults &results);
 

src/lyrics/lyricsfetchersearch.h

@@ -43,7 +43,7 @@ class LyricsFetcherSearch : public QObject {
   void Start(SharedPtr<LyricsProviders> lyrics_providers);
   void Cancel();
 
- signals:
+ Q_SIGNALS:
   void SearchFinished(const quint64 id, const LyricsSearchResults &results);
   void LyricsFetched(const quint64 id, const QString &provider, const QString &lyrics);
 

src/lyrics/lyricsprovider.h

@@ -56,7 +56,7 @@ class LyricsProvider : public QObject {
 
   virtual void Error(const QString &error, const QVariant &debug = QVariant()) = 0;
 
- signals:
+ Q_SIGNALS:
   void AuthenticationComplete(const bool success, const QStringList &errors = QStringList());
   void AuthenticationSuccess();
   void AuthenticationFailure(const QStringList &errors);