DXVA: Add --disable-low-latency-dxva to disable low latency decoding

media/gpu/dxva_video_decode_accelerator_win.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_GPU_DXVA_VIDEO_DECODE_ACCELERATOR_WIN_H_
 #define MEDIA_GPU_DXVA_VIDEO_DECODE_ACCELERATOR_WIN_H_
 
 #include <d3d11.h>
 #include <d3d9.h>
 #include <initguid.h>
@@ skipping 462 matching lines @@
   // Disallow rebinding WeakReference ownership to a different thread by
   // keeping a persistent reference. This avoids problems with the
   // thread safety of reaching into this class from multiple threads to
   // attain a WeakPtr.
   base::WeakPtr<DXVAVideoDecodeAccelerator> weak_ptr_;
 
   // Set to true if we are in the context of a Flush operation. Used to prevent
   // multiple flush done notifications being sent out.
   bool pending_flush_;
 
+  // Use CODECAPI_AVLowLatencyMode.
+  bool enable_low_latency_;
+
   bool share_nv12_textures_;
 
   // Copy NV12 texture to another NV12 texture.
   bool copy_nv12_textures_;
 
   // Defaults to false. Indicates if we should use D3D or DX11 interfaces for
   // H/W decoding.
   bool use_dx11_;
 
   // True when using Microsoft's VP9 HMFT for decoding.
@@ skipping 31 matching lines @@
 
   // Function pointer for the MFCreateDXGIDeviceManager API.
   static CreateDXGIDeviceManager create_dxgi_device_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(DXVAVideoDecodeAccelerator);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_GPU_DXVA_VIDEO_DECODE_ACCELERATOR_WIN_H_