[WIP] Make content_shell run under Wayland

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 8f837b586e4b993b7d3a5bdf31a6eca19a2c26ed..abc341b6da24761785c0038ecca3f503acc36dce 100644
--- a/ui/ozone/platform/wayland/wayland_connection.h
+++ b/ui/ozone/platform/wayland/wayland_connection.h
@@ -13,6 +13,7 @@
 #include "ui/ozone/platform/wayland/wayland_object.h"
 #include "ui/ozone/platform/wayland/wayland_output.h"
 #include "ui/ozone/platform/wayland/wayland_pointer.h"
+#include "ui/ozone/public/ozone_platform_screen_delegate.h"
 
 namespace ui {
 
@@ -26,6 +27,7 @@ class WaylandConnection : public PlatformEventSource,
 
   bool Initialize();
   bool StartProcessingEvents();
+  static WaylandConnection* GetInstance() { return instance_; }
 
   // Schedules a flush of the Wayland connection.
   void ScheduleFlush();
@@ -41,6 +43,8 @@ class WaylandConnection : public PlatformEventSource,
 
   const std::vector<std::unique_ptr<WaylandOutput>>& GetOutputList() const;
   WaylandOutput* PrimaryOutput() const;
+  void SetOutputObserver(OzonePlatformScreenDelegate*);
+  void OnOutputGeometryChanged(int32_t name, const gfx::Rect&);
 
  private:
   void Flush();
@@ -69,6 +73,7 @@ class WaylandConnection : public PlatformEventSource,
   static void Ping(void* data, xdg_shell* shell, uint32_t serial);
 
   std::map<gfx::AcceleratedWidget, WaylandWindow*> window_map_;
+  static WaylandConnection* instance_;
 
   wl::Object<wl_display> display_;
   wl::Object<wl_registry> registry_;
@@ -84,6 +89,7 @@ class WaylandConnection : public PlatformEventSource,
   base::MessagePumpLibevent::FileDescriptorWatcher controller_;
 
   std::vector<std::unique_ptr<WaylandOutput>> output_list_;
+  OzonePlatformScreenDelegate* output_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(WaylandConnection);
 };