gpu: Add CHROMIUM_schedule_ca_layer

content/common/gpu/image_transport_surface_overlay_mac.h

Index: content/common/gpu/image_transport_surface_overlay_mac.h
diff --git a/content/common/gpu/image_transport_surface_overlay_mac.h b/content/common/gpu/image_transport_surface_overlay_mac.h
index 3dcf9e874c28addd820e8abc91e20ff35022344a..017b2836dcda20e95327ececf30f064e2af30636 100644
--- a/content/common/gpu/image_transport_surface_overlay_mac.h
+++ b/content/common/gpu/image_transport_surface_overlay_mac.h
@@ -46,6 +46,12 @@ class ImageTransportSurfaceOverlayMac : public gfx::GLSurface,
                             gl::GLImage* image,
                             const gfx::Rect& bounds_rect,
                             const gfx::RectF& crop_rect) override;
+  bool ScheduleCALayer(gl::GLImage* contents_image,
+                       const gfx::RectF& contents_rect,
+                       float opacity,
+                       unsigned background_color,
+                       const gfx::SizeF& bounds_size,
+                       const gfx::Transform& transform) override;
   bool IsSurfaceless() const override;
 
   // ImageTransportSurface implementation
@@ -66,7 +72,7 @@ class ImageTransportSurfaceOverlayMac : public gfx::GLSurface,
 
   void UpdateRootAndPartialDamagePlanes(
       const linked_ptr<OverlayPlane>& new_root_plane,
-      const gfx::RectF& dip_damage_rect);
+      const gfx::RectF& pixel_damage_rect);
   void UpdateOverlayPlanes(
       const std::vector<linked_ptr<OverlayPlane>>& new_overlay_planes);
   void UpdateCALayerTree();
@@ -133,6 +139,10 @@ class ImageTransportSurfaceOverlayMac : public gfx::GLSurface,
   base::TimeTicks vsync_timebase_;
   base::TimeDelta vsync_interval_;
 
+  // Calls to ScheduleCALayer come in back-to-front. This is reset to 1 at each
+  // swap and increments with each call to ScheduleCALayer.
+  int next_ca_layer_z_order_;
+
   base::Timer display_pending_swap_timer_;
   base::WeakPtrFactory<ImageTransportSurfaceOverlayMac> weak_factory_;
 };