Use S_OK as (HRESULT)0L to initialize HRESULT variable.

Bug: None
Change-Id: I746ff81323960649c5d52c3f4092466caa171aca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4563415


Reviewed-by: Eugene Zemtsov <eugene@chromium.org>
Commit-Queue: Chunbo Hua <chunbo.hua@intel.com>
Cr-Commit-Position: refs/heads/main@{#1148938}