use `SharedMemory::{named, anon}` to replace `::new`

The new constructors are shorter and omit the bare `None` in the `anon`
call sites which gave no clues to the reader what the effect of that
`None` was. This should improve readability.

TEST=./build_test
BUG=None

Change-Id: I2e34e7df9a4ccc5da50edf4e963a6a42e3d84b22
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1797188
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Commit-Queue: Zach Reizner <zachr@chromium.org>
Tested-by: Zach Reizner <zachr@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/devices/src/virtio/descriptor_utils.rs b/devices/src/virtio/descriptor_utils.rs
index 5142ecf..0ea4faa 100644
--- a/devices/src/virtio/descriptor_utils.rs
+++ b/devices/src/virtio/descriptor_utils.rs
@@ -675,7 +675,7 @@ mod tests {
         let mut reader = Reader::new(&memory, chain);
 
         // GuestMemory's write_from_memory requires raw file descriptor.
-        let mut shm = SharedMemory::new(None).unwrap();
+        let mut shm = SharedMemory::anon().unwrap();
         shm.set_size(384).unwrap();
 
         // Prevent shared memory from growing on `write` call.
@@ -712,7 +712,7 @@ mod tests {
         let mut writer = Writer::new(&memory, chain);
 
         // GuestMemory's read_to_memory requires raw file descriptor.
-        let mut shm = SharedMemory::new(None).unwrap();
+        let mut shm = SharedMemory::anon().unwrap();
         shm.set_size(384).unwrap();
 
         if let Ok(_) = writer.write_from(&shm, 512) {