mus-gpu: Fix a couple of issues with MojoGpuMemoryBufferManager.

services/ui/public/cpp/gpu/gpu_service.cc

Index: services/ui/public/cpp/gpu/gpu_service.cc
diff --git a/services/ui/public/cpp/gpu/gpu_service.cc b/services/ui/public/cpp/gpu/gpu_service.cc
index 45ce4ca04957530b31ceff9c1c62772bc6af2237..8079804525a9f718bfab74bc22e624a4b56b7bb1 100644
--- a/services/ui/public/cpp/gpu/gpu_service.cc
+++ b/services/ui/public/cpp/gpu/gpu_service.cc
@@ -24,10 +24,13 @@ GpuService::GpuService(service_manager::Connector* connector,
       io_task_runner_(std::move(task_runner)),
       connector_(connector),
       shutdown_event_(base::WaitableEvent::ResetPolicy::AUTOMATIC,
-                      base::WaitableEvent::InitialState::NOT_SIGNALED),
-      gpu_memory_buffer_manager_(new MojoGpuMemoryBufferManager(connector_)) {
+                      base::WaitableEvent::InitialState::NOT_SIGNALED) {
   DCHECK(main_task_runner_);
   DCHECK(connector_);
+  mojom::GpuServicePtr gpu_service_ptr;
+  connector_->ConnectToInterface(ui::mojom::kServiceName, &gpu_service_ptr);
+  gpu_memory_buffer_manager_ =
+      base::MakeUnique<MojoGpuMemoryBufferManager>(std::move(gpu_service_ptr));
   if (!io_task_runner_) {
     io_thread_.reset(new base::Thread("GPUIOThread"));
     base::Thread::Options thread_options(base::MessageLoop::TYPE_IO, 0);