ui: Add ref-counting to GLFence class.

gpu/ipc/service/gpu_channel.cc

Index: gpu/ipc/service/gpu_channel.cc
diff --git a/gpu/ipc/service/gpu_channel.cc b/gpu/ipc/service/gpu_channel.cc
index 60838010ba0fb741c63571120506c71d6a7e5e26..9f3df9f3c88c7e73697fa64831a42bbab9a1d24c 100644
--- a/gpu/ipc/service/gpu_channel.cc
+++ b/gpu/ipc/service/gpu_channel.cc
@@ -1074,15 +1074,16 @@ scoped_refptr<gl::GLImage> GpuChannel::CreateImageForGpuMemoryBuffer(
   }
 }
 
-std::unique_ptr<gl::GLFence> GpuChannel::CreateFenceForGpuFence(
+scoped_refptr<gl::GLFence> GpuChannel::CreateFenceForGpuFence(
     const gfx::GpuFenceHandle& handle) {
 #if defined(OS_LINUX)
   base::ScopedFD libsync_fd(handle.fd.fd);
   if (libsync_fd.is_valid())
-    return base::MakeUnique<gl::GLFenceLibsync>(std::move(libsync_fd));
+    return make_scoped_refptr(new gl::GLFenceLibsync(std::move(libsync_fd)));
 #endif
 
-  return base::MakeUnique<gl::GLFenceSharedEvent>(handle.shared_event_handle);
+  return make_scoped_refptr(
+      new gl::GLFenceSharedEvent(handle.shared_event_handle));
 }
 
 }  // namespace gpu