Change NativeBufferOzone to be an object and move the overlay calls to the surface object.

ui/ozone/public/surface_ozone_egl.h

Index: ui/ozone/public/surface_ozone_egl.h
diff --git a/ui/ozone/public/surface_ozone_egl.h b/ui/ozone/public/surface_ozone_egl.h
index fa7e43a3ef1ec86ccb1aad0524ab5ff5eb58a8f6..1f1486968206f0e4b3b262393cb31dd527c7408f 100644
--- a/ui/ozone/public/surface_ozone_egl.h
+++ b/ui/ozone/public/surface_ozone_egl.h
@@ -15,6 +15,7 @@ class VSyncProvider;
 }
 
 namespace ui {
+class NativePixmap;
 
 // The platform-specific part of an EGL surface.
 //
@@ -42,6 +43,21 @@ class OZONE_BASE_EXPORT SurfaceOzoneEGL {
   // outside of the sandbox, they must have been completed in
   // InitializeHardware. Returns an empty scoped_ptr on error.
   virtual scoped_ptr<gfx::VSyncProvider> CreateVSyncProvider() = 0;
+
+  // Sets the overlay plane to switch to at the next page flip.
+  // |plane_z_order| specifies the stacking order of the plane relative to the
+  // main framebuffer located at index 0.
+  // |plane_transform| specifies how the buffer is to be transformed during.
+  // composition.
+  // |buffer| to be presented by the overlay.
+  // |display_bounds| specify where it is supposed to be on the screen.
+  // |crop_rect| specifies the region within the buffer to be placed inside
+  // |display_bounds|.
+  virtual bool ScheduleOverlayPlane(int plane_z_order,
+                                    gfx::OverlayTransform plane_transform,
+                                    ui::NativePixmap* buffer,

[alexst (slow to review), 2014/07/03 18:30:32]

Since we are ref counting these, maybe raw ptr isn't the safest here. I suppose
whoever calls this should know not to delete this until after the following
flip, and if so it's worth documenting it.

[achaulk, 2014/07/03 19:49:44]

I was planning on taking references internally anyway, but users of the API
shouldn't really have to know or care about that. As far as they know, it's
"deleted" when their last reference is release

+                                    const gfx::Rect& display_bounds,
+                                    const gfx::RectF& crop_rect) = 0;
 };
 
 }  // namespace ui