Remove more GpuMemoryBufferId plumbing

cc/surfaces/surface_aggregator.cc

Index: cc/surfaces/surface_aggregator.cc
diff --git a/cc/surfaces/surface_aggregator.cc b/cc/surfaces/surface_aggregator.cc
index 62a85fc0e35b96e1efb669184e83f38af8f6c6e8..83e313dd58312c2271b487b1021f604554096751 100644
--- a/cc/surfaces/surface_aggregator.cc
+++ b/cc/surfaces/surface_aggregator.cc
@@ -138,8 +138,7 @@ int SurfaceAggregator::ChildIdForSurface(Surface* surface) {
       surface_id_to_resource_child_id_.find(surface->surface_id());
   if (it == surface_id_to_resource_child_id_.end()) {
     int child_id =
-        provider_->CreateChild(base::Bind(&UnrefHelper, surface->factory()),
-                               surface->gpu_memory_buffer_client_id());
+        provider_->CreateChild(base::Bind(&UnrefHelper, surface->factory()));
     if (surface->factory()) {
       provider_->SetChildNeedsSyncTokens(
           child_id, surface->factory()->needs_sync_points());