ozone: Port WindowTreeHostOzone on top of PlatformWindow

ui/ozone/platform/dri/ozone_platform_dri.cc

Index: ui/ozone/platform/dri/ozone_platform_dri.cc
diff --git a/ui/ozone/platform/dri/ozone_platform_dri.cc b/ui/ozone/platform/dri/ozone_platform_dri.cc
index bb4c9a330558a5c52eba72903aca46620f21ced6..13c8735ed5bb5def64b0b667897c444cb4d8c761 100644
--- a/ui/ozone/platform/dri/ozone_platform_dri.cc
+++ b/ui/ozone/platform/dri/ozone_platform_dri.cc
@@ -8,6 +8,7 @@
 #include "ui/events/ozone/device/device_manager.h"
 #include "ui/events/ozone/evdev/cursor_delegate_evdev.h"
 #include "ui/events/ozone/evdev/event_factory_evdev.h"
+#include "ui/ozone/common/platform_window_base.h"
 #include "ui/ozone/platform/dri/cursor_factory_evdev_dri.h"
 #include "ui/ozone/platform/dri/dri_surface.h"
 #include "ui/ozone/platform/dri/dri_surface_factory.h"
@@ -77,6 +78,12 @@ class OzonePlatformDri : public OzonePlatform {
   virtual GpuPlatformSupportHost* GetGpuPlatformSupportHost() OVERRIDE {
     return NULL;  // no GPU support
   }
+  virtual scoped_ptr<PlatformWindow> CreatePlatformWindow(
+      PlatformWindowDelegate* delegate,
+      const gfx::Rect& bounds) OVERRIDE {
+    return make_scoped_ptr<PlatformWindow>(
+        new PlatformWindowCompat(delegate, bounds));
+  }
 #if defined(OS_CHROMEOS)
   virtual scoped_ptr<NativeDisplayDelegate> CreateNativeDisplayDelegate()
       OVERRIDE {