Ozone: Dont hardcode format to YUV when using Overlay Composition.

ui/ozone/platform/drm/gpu/gbm_surfaceless.h

Index: ui/ozone/platform/drm/gpu/gbm_surfaceless.h
diff --git a/ui/ozone/platform/drm/gpu/gbm_surfaceless.h b/ui/ozone/platform/drm/gpu/gbm_surfaceless.h
index 99abc24e9853caede3f6267340c91af8b04021fb..661133234df222925640bf7cf34465fa7fd9f39a 100644
--- a/ui/ozone/platform/drm/gpu/gbm_surfaceless.h
+++ b/ui/ozone/platform/drm/gpu/gbm_surfaceless.h
@@ -7,6 +7,8 @@
 
 #include <vector>
 
+#include "base/memory/weak_ptr.h"
+#include "ui/gfx/buffer_types.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/ozone/platform/drm/gpu/overlay_plane.h"
 #include "ui/ozone/public/surface_ozone_egl.h"
@@ -19,6 +21,7 @@ namespace ui {
 
 class DrmWindowProxy;
 class GbmSurfaceFactory;
+struct OverlayCheck_Params;
 
 // In surfaceless mode drawing and displaying happens directly through
 // NativePixmap buffers. CC would call into SurfaceFactoryOzone to allocate the
@@ -32,6 +35,19 @@ class GbmSurfaceless : public SurfaceOzoneEGL {
 
   void QueueOverlayPlane(const OverlayPlane& plane);
 
+  // Returns optimal buffer configuration which can be supported by the display
+  // on which |window_| is shown.
+  void EvaluateBufferConfiguration(const gfx::Rect& display_rect,
+                                   const gfx::RectF& crop_rect,
+                                   const gfx::Size& buffer_size,
+                                   gfx::BufferFormat buffer_format,
+                                   gfx::OverlayTransform transform,
+                                   uint32_t z_order,
+                                   gfx::Size* target_size,
+                                   gfx::BufferFormat* target_format);
+
+  void GetOverlayBufferConfigurations(
+      const std::vector<OverlayCheck_Params>& params);
   // SurfaceOzoneEGL:
   intptr_t GetNativeWindow() override;
   bool ResizeNativeWindow(const gfx::Size& viewport_size) override;
@@ -46,6 +62,9 @@ class GbmSurfaceless : public SurfaceOzoneEGL {
   GbmSurfaceFactory* surface_manager_;
 
   std::vector<OverlayPlane> planes_;
+  std::vector<OverlayCheck_Params> overlay_params_;
+
+  base::WeakPtrFactory<GbmSurfaceless> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GbmSurfaceless);
 };