JsonSerializer returns QByteArray

JSON supports UTF-16, however the serializer is 8-bit clean.  Instead of
returning a QString only to turn it back into a QByteArray, return a
QByteArray on serialization.

src/Command.cpp

@@ -15,3 +15,7 @@ void Command::emitFinished(bool success, QString message) {
   emit finished(new Response(success, message, this));
 }
 
+void Command::emitFinished(bool success, QByteArray message) {
+  emit finished(new Response(success, message, this));
+}
+

src/Command.h

@@ -16,6 +16,7 @@ class Command : public QObject {
   protected:
     void emitFinished(bool success);
     void emitFinished(bool success, QString message);
+    void emitFinished(bool success, QByteArray message);
 
   signals:
     void finished(Response *response);

src/ConsoleMessages.cpp

@@ -8,7 +8,7 @@ ConsoleMessages::ConsoleMessages(WebPageManager *manager, QStringList &arguments
 
 void ConsoleMessages::start() {
   JsonSerializer serializer;
-  QString json = serializer.serialize(page()->consoleMessages());
+  QByteArray json = serializer.serialize(page()->consoleMessages());
   emitFinished(true, json);
 }
 

src/GetWindowHandles.cpp

@@ -15,7 +15,7 @@ void GetWindowHandles::start() {
     handles << page->uuid();
 
   JsonSerializer serializer;
-  QString json = serializer.serialize(handles);
+  QByteArray json = serializer.serialize(handles);
 
   emitFinished(true, json);
 }

src/JsonSerializer.cpp

@@ -3,7 +3,7 @@
 JsonSerializer::JsonSerializer(QObject *parent) : QObject(parent) {
 }
 
-QString JsonSerializer::serialize(const QVariant &object) {
+QByteArray JsonSerializer::serialize(const QVariant &object) {
   addVariant(object);
   return m_buffer;
 }
@@ -82,7 +82,7 @@ void JsonSerializer::addMap(const QVariantMap &map) {
   m_buffer.append("}");
 }
 
-QString JsonSerializer::sanitizeString(QString str) {
+QByteArray JsonSerializer::sanitizeString(QString str) {
   str.replace("\\", "\\\\");
   str.replace("\"", "\\\"");
   str.replace("\b", "\\b");
@@ -91,7 +91,7 @@ QString JsonSerializer::sanitizeString(QString str) {
   str.replace("\r", "\\r");
   str.replace("\t", "\\t");
 
-  QString result;
+  QByteArray result;
   const ushort* unicode = str.utf16();
   unsigned int i = 0;
 

src/JsonSerializer.h

@@ -6,15 +6,15 @@ class JsonSerializer : public QObject {
 
   public:
     JsonSerializer(QObject *parent = 0);
-    QString serialize(const QVariant &object);
+    QByteArray serialize(const QVariant &object);
 
   private:
     void addVariant(const QVariant &object);
     void addString(const QString &string);
     void addArray(const QVariantList &list);
     void addMap(const QVariantMap &map);
-    QString sanitizeString(QString string);
+    QByteArray sanitizeString(QString string);
 
-    QString m_buffer;
+    QByteArray m_buffer;
 };