Make MetaOutput a GObject

Turn MetaOutput into a GObject and move it to a separate file. This
changes the storage format, resulting in changing the API for accessing
MetaOutputs from using an array, to using a GList.

https://bugzilla.gnome.org/show_bug.cgi?id=785381

src/backends/meta-output.c

@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2017 Red Hat
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include "backends/meta-output.h"
+
+G_DEFINE_TYPE (MetaOutput, meta_output, G_TYPE_OBJECT)
+
+static void
+meta_output_finalize (GObject *object)
+{
+  MetaOutput *output = META_OUTPUT (object);
+
+  g_free (output->name);
+  g_free (output->vendor);
+  g_free (output->product);
+  g_free (output->serial);
+  g_free (output->modes);
+  g_free (output->possible_crtcs);
+  g_free (output->possible_clones);
+
+  if (output->driver_notify)
+    output->driver_notify (output);
+
+  G_OBJECT_CLASS (meta_output_parent_class)->finalize (object);
+}
+
+static void
+meta_output_init (MetaOutput *output)
+{
+}
+
+static void
+meta_output_class_init (MetaOutputClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = meta_output_finalize;
+}