Return overlay resources to renderers in larger batches.

cc/output/dc_layer_overlay.h

 // Copyright 2017 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 CC_OUTPUT_DC_LAYER_OVERLAY_H_
 #define CC_OUTPUT_DC_LAYER_OVERLAY_H_
 
 #include "base/memory/ref_counted.h"
 #include "cc/quads/render_pass.h"
 #include "third_party/skia/include/core/SkColor.h"
@@ skipping 26 matching lines @@
 // Holds all information necessary to construct a DCLayer from a DrawQuad.
 class CC_EXPORT DCLayerOverlay {
  public:
   DCLayerOverlay();
   DCLayerOverlay(const DCLayerOverlay& other);
   ~DCLayerOverlay();
 
   // State that is frequently shared between consecutive DCLayerOverlays.
   scoped_refptr<DCLayerOverlaySharedState> shared_state;
 
-  // Texture that corresponds to an IOSurface to set as the content of the
-  // DCLayer. If this is 0 then the DCLayer is a solid color.
-  unsigned contents_resource_id = 0;
+  // Resource ids that correspond to the DXGI textures to set as the contents
+  // of the DCLayer.
+  DrawQuad::Resources resources;
   // The contents rect property for the DCLayer.
   gfx::RectF contents_rect;
   // The bounds for the DCLayer in pixels.
   gfx::RectF bounds_rect;
   // The background color property for the DCLayer.
   SkColor background_color = SK_ColorTRANSPARENT;
   // The edge anti-aliasing mask property for the DCLayer.
   unsigned edge_aa_mask = 0;
   // The minification and magnification filters for the DCLayer.
   unsigned filter;
@@ skipping 33 matching lines @@
                              DCLayerOverlay* ca_layer_overlay);
 
   gfx::Rect previous_frame_underlay_rect_;
   gfx::Rect previous_occlusion_bounding_box_;
   gfx::RectF previous_display_rect_;
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_DC_LAYER_OVERLAY_H_