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

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_OZONE_PLATFORM_DRM_GPU_DRM_WINDOW_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_DRM_WINDOW_H_
 
 #include <vector>
 
 #include "base/timer/timer.h"
@@ skipping 78 matching lines @@
   std::vector<OverlayCheck_Params> TestPageFlip(
       const std::vector<OverlayCheck_Params>& planes,
       ScanoutBufferGenerator* buffer_generator);
 
   // Returns the last buffer associated with this window.
   const OverlayPlane* GetLastModesetBuffer();
 
   void GetVSyncParameters(
       const gfx::VSyncProvider::UpdateVSyncCallback& callback) const;
 
+  // Returns optimal buffer configuration which can be supported by the display
+  // on which this window is shown.
+  OverlayBufferConfiguration GetOverlayBufferConfiguration(
+      const gfx::Rect& display_bounds,
+      const gfx::RectF& crop_rect,
+      const gfx::Size& current_buffer_size,
+      uint32_t z_order,
+      bool video_content);
+
  private:
   // Draw the last set cursor & update the cursor plane.
   void ResetCursor(bool bitmap_only);
 
   // Draw next frame in an animated cursor.
   void OnCursorAnimationTimeout();
 
   // When |controller_| changes this is called to reallocate the cursor buffers
   // since the allocation DRM device may have changed.
   void UpdateCursorBuffers();
@@ skipping 23 matching lines @@
   OverlayPlaneList last_submitted_planes_;
 
   bool force_buffer_reallocation_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(DrmWindow);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_DRM_WINDOW_H_