Ensure Dxgi duplicator works correctly in session 0
A recent update of Windows 10 blocks IDXGIAdapter::EnumOutputs() in session 0,
so ScreenCapturerWinDirectx::IsSupported() always returns false in session 0. We
should ensure ScreenCapturerWinDirectx can respond correctly in session 0.
Meanwhile, this change looses the requirement of DirectX capturer: it still
works if some of the video adapters do not support DirectX 11 or
IDXGIOutputDuplication. This issue usually happens when handling a virtual video
adapter.
BUG=webrtc:7809
Review-Url: https://codereview.webrtc.org/2937663003
Cr-Original-Commit-Position: refs/heads/master@{#18797}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 3dd574ad31ce7eaba7d5901ffcd627367bce6b0f
6 files changed
