Remove SurfaceFactory::Create and SurfaceFactory::Destroy

cc/surfaces/direct_compositor_frame_sink.cc

Index: cc/surfaces/direct_compositor_frame_sink.cc
diff --git a/cc/surfaces/direct_compositor_frame_sink.cc b/cc/surfaces/direct_compositor_frame_sink.cc
index b504ab1539ea12530f910a0f58d37c0719386b27..1633fb47a6fc8014ca03e4b45a63fbb3fe96e130 100644
--- a/cc/surfaces/direct_compositor_frame_sink.cc
+++ b/cc/surfaces/direct_compositor_frame_sink.cc
@@ -82,8 +82,6 @@ void DirectCompositorFrameSink::DetachFromClient() {
   // Unregister the SurfaceFactoryClient here instead of the dtor so that only
   // one client is alive for this namespace at any given time.
   surface_manager_->UnregisterSurfaceFactoryClient(frame_sink_id_);
-  if (!delegated_local_frame_id_.is_null())
-    factory_.Destroy(delegated_local_frame_id_);
 
   CompositorFrameSink::DetachFromClient();
 }
@@ -91,11 +89,7 @@ void DirectCompositorFrameSink::DetachFromClient() {
 void DirectCompositorFrameSink::SubmitCompositorFrame(CompositorFrame frame) {
   gfx::Size frame_size = frame.render_pass_list.back()->output_rect.size();
   if (frame_size.IsEmpty() || frame_size != last_swap_frame_size_) {
-    if (!delegated_local_frame_id_.is_null()) {
-      factory_.Destroy(delegated_local_frame_id_);
-    }
     delegated_local_frame_id_ = surface_id_allocator_.GenerateId();
-    factory_.Create(delegated_local_frame_id_);
     last_swap_frame_size_ = frame_size;
   }
   display_->SetSurfaceId(SurfaceId(frame_sink_id_, delegated_local_frame_id_),
@@ -144,7 +138,8 @@ void DirectCompositorFrameSink::DisplayDidDrawAndSwap() {
 }
 
 void DirectCompositorFrameSink::DidDrawCallback() {
-  client_->DidReceiveCompositorFrameAck();
+  if (client_)
+    client_->DidReceiveCompositorFrameAck();
 }
 
 }  // namespace cc