ozone/platform/wayland: Add support for wl_output_interface

ui/ozone/platform/wayland/wayland_connection.h

Index: ui/ozone/platform/wayland/wayland_connection.h
diff --git a/ui/ozone/platform/wayland/wayland_connection.h b/ui/ozone/platform/wayland/wayland_connection.h
index 108cac558b2e1f8080665d618157ba4d229c3b87..4a0f08017d5550abf87d22f8fc2b0fbcc997c779 100644
--- a/ui/ozone/platform/wayland/wayland_connection.h
+++ b/ui/ozone/platform/wayland/wayland_connection.h
@@ -11,6 +11,7 @@
 #include "ui/events/platform/platform_event_source.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/ozone/platform/wayland/wayland_object.h"
+#include "ui/ozone/platform/wayland/wayland_output.h"
 #include "ui/ozone/platform/wayland/wayland_pointer.h"
 
 namespace ui {
@@ -38,6 +39,9 @@ class WaylandConnection : public PlatformEventSource,
   void AddWindow(gfx::AcceleratedWidget widget, WaylandWindow* window);
   void RemoveWindow(gfx::AcceleratedWidget widget);
 
+  const std::vector<WaylandOutput*>& GetOutputList() const;
+  WaylandOutput* PrimaryOutput() const;
+
  private:
   void Flush();
   void DispatchUiEvent(Event* event);
@@ -79,6 +83,8 @@ class WaylandConnection : public PlatformEventSource,
   bool watching_ = false;
   base::MessagePumpLibevent::FileDescriptorWatcher controller_;
 
+  std::vector<WaylandOutput*> output_list_;
+
   DISALLOW_COPY_AND_ASSIGN(WaylandConnection);
 };