ozone: introduce OverlayCheckReturn_Params

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

 // Copyright 2015 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_OVERLAY_VALIDATOR_H_
 #define UI_OZONE_PLATFORM_DRM_GPU_DRM_OVERLAY_VALIDATOR_H_
 
 #include "base/containers/mru_cache.h"
 #include "ui/ozone/platform/drm/gpu/overlay_plane.h"
 
 namespace ui {
 
 class DrmWindow;
 class ScanoutBufferGenerator;
 struct OverlayCheck_Params;
+struct OverlayCheckReturn_Params;
 
 class DrmOverlayValidator {
  public:
   DrmOverlayValidator(DrmWindow* window,
                       ScanoutBufferGenerator* buffer_generator);
   ~DrmOverlayValidator();
 
   // Tests if configurations |params| are compatible with |window_| and finds
   // which of these configurations can be promoted to Overlay composition
   // without failing the page flip. It expects |params| to be sorted by z_order.
-  std::vector<OverlayCheck_Params> TestPageFlip(
+  std::vector<OverlayCheckReturn_Params> TestPageFlip(
       const std::vector<OverlayCheck_Params>& params,
       const OverlayPlaneList& last_used_planes);
 
   // Checks if buffers bound to planes can be optimized (i.e. format, scaling)to
   // reduce Display Read bandwidth. This should be called before an actual page
   // flip. Expects |planes| to be sorted by Z order.
   OverlayPlaneList PrepareBuffersForPageFlip(const OverlayPlaneList& planes);
 
   // Clears internal cache of validated overlay configurations. This should be
   // usually called when |window_| size has changed or moved controller.
@@ skipping 28 matching lines @@
 
   // List of all configurations which have been validated.
   base::MRUCache<OverlayPlaneList, OverlayHintsList> overlay_hints_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(DrmOverlayValidator);
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_DRM_OVERLAY_VALIDATOR_H_