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

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

Index: ui/ozone/platform/drm/gpu/gbm_buffer.h
diff --git a/ui/ozone/platform/drm/gpu/gbm_buffer.h b/ui/ozone/platform/drm/gpu/gbm_buffer.h
index 2be65dda871734260230a9f0d683a85bfb5008e6..74439215e89f3e5d2ee999e15adbec4b139f3221 100644
--- a/ui/ozone/platform/drm/gpu/gbm_buffer.h
+++ b/ui/ozone/platform/drm/gpu/gbm_buffer.h
@@ -10,6 +10,7 @@
 #include "ui/gfx/buffer_types.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/ozone/platform/drm/gpu/gbm_buffer_base.h"
+#include "ui/ozone/platform/drm/gpu/overlay_plane.h"
 #include "ui/ozone/public/native_pixmap.h"
 
 struct gbm_bo;
@@ -70,10 +71,8 @@ class GbmPixmap : public NativePixmap {
 
  private:
   ~GbmPixmap() override;
-  bool ShouldApplyProcessing(const gfx::Rect& display_bounds,
-                             const gfx::RectF& crop_rect,
-                             gfx::Size* target_size,
-                             gfx::BufferFormat* target_format);
+  bool CopyBuffer(const scoped_refptr<ScanoutBuffer>& source_buffer,
+                  scoped_refptr<ScanoutBuffer>& target_buffer);
 
   scoped_refptr<GbmBuffer> buffer_;
   base::ScopedFD dma_buf_;
@@ -82,6 +81,7 @@ class GbmPixmap : public NativePixmap {
   GbmSurfaceFactory* surface_manager_;
 
   ProcessingCallback processing_callback_;
+  OverlayPlane::CopyBufferCallback copy_buffer_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(GbmPixmap);
 };