cc:: Remove RenderSurfaceImpl::TargetEffectTreeIndex

cc/layers/render_surface_impl.cc

Index: cc/layers/render_surface_impl.cc
diff --git a/cc/layers/render_surface_impl.cc b/cc/layers/render_surface_impl.cc
index 600206faa081522f815ead7ae6d41d0e912123d6..33bf0f8c79ca4373aab6fe5a62f265946ff3d336 100644
--- a/cc/layers/render_surface_impl.cc
+++ b/cc/layers/render_surface_impl.cc
@@ -103,12 +103,6 @@ int RenderSurfaceImpl::EffectTreeIndex() const {
   return owning_layer_->effect_tree_index();
 }
 
-int RenderSurfaceImpl::TargetEffectTreeIndex() const {
-  if (!owning_layer_->parent() || !owning_layer_->parent()->render_target())
-    return -1;
-  return owning_layer_->parent()->render_target()->effect_tree_index();
-}
-
 void RenderSurfaceImpl::SetClipRect(const gfx::Rect& clip_rect) {
   if (clip_rect_ == clip_rect)
     return;