cc: Move RenderTarget Information to Effect Tree

cc/layers/layer_impl.h

Index: cc/layers/layer_impl.h
diff --git a/cc/layers/layer_impl.h b/cc/layers/layer_impl.h
index 37055539d0a93744d8aaceef1416db37ad054ea4..262a6e12a6640814c80fc031e9c9c7af047cd123 100644
--- a/cc/layers/layer_impl.h
+++ b/cc/layers/layer_impl.h
@@ -358,6 +358,11 @@ class CC_EXPORT LayerImpl {
 
   RenderSurfaceImpl* render_surface() const { return render_surface_.get(); }
 
+  // The render surface which this layer draws into. This can be either owned by
+  // the same layer or an ancestor of this layer.
+  RenderSurfaceImpl* render_target();
+  const RenderSurfaceImpl* render_target() const;
+
   DrawProperties& draw_properties() { return draw_properties_; }
   const DrawProperties& draw_properties() const { return draw_properties_; }
 
@@ -389,17 +394,6 @@ class CC_EXPORT LayerImpl {
   gfx::Rect visible_layer_rect() const {
     return draw_properties_.visible_layer_rect;
   }
-  LayerImpl* render_target() {
-    DCHECK(!draw_properties_.render_target ||
-           draw_properties_.render_target->render_surface());
-    return draw_properties_.render_target;
-  }
-  const LayerImpl* render_target() const {
-    DCHECK(!draw_properties_.render_target ||
-           draw_properties_.render_target->render_surface());
-    return draw_properties_.render_target;
-  }
-
   size_t num_unclipped_descendants() const {
     return draw_properties_.num_unclipped_descendants;
   }