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

content/public/browser/gpu_utils.cc

 // Copyright 2016 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.
 
 #include "content/public/browser/gpu_utils.h"
 
 #include "base/command_line.h"
 #include "base/strings/string_number_conversions.h"
 #include "content/public/common/content_switches.h"
 #include "gpu/command_buffer/service/gpu_switches.h"
@@ skipping 40 matching lines @@
 #endif
 #if defined(OS_WIN)
   uint32_t enable_accelerated_vpx_decode_val =
       gpu::GpuPreferences::VPX_VENDOR_MICROSOFT;
   if (GetUintFromSwitch(command_line, switches::kEnableAcceleratedVpxDecode,
                         &enable_accelerated_vpx_decode_val)) {
     gpu_preferences.enable_accelerated_vpx_decode =
         static_cast<gpu::GpuPreferences::VpxDecodeVendors>(
             enable_accelerated_vpx_decode_val);
   }
+  gpu_preferences.enable_low_latency_dxva =
+      !command_line->HasSwitch(switches::kDisableLowLatencyDxva);
   gpu_preferences.enable_zero_copy_dxgi_video =
       !command_line->HasSwitch(switches::kDisableZeroCopyDxgiVideo);
   gpu_preferences.enable_nv12_dxgi_video =
       !command_line->HasSwitch(switches::kDisableNv12DxgiVideo);
 #endif
   gpu_preferences.compile_shader_always_succeeds =
       command_line->HasSwitch(switches::kCompileShaderAlwaysSucceeds);
   gpu_preferences.disable_gl_error_limit =
       command_line->HasSwitch(switches::kDisableGLErrorLimit);
   gpu_preferences.disable_glsl_translator =
@@ skipping 34 matching lines @@
       command_line->HasSwitch(switches::kEnableGPUServiceTracing);
   gpu_preferences.enable_unsafe_es3_apis =
       command_line->HasSwitch(switches::kEnableUnsafeES3APIs) &&
       !command_line->HasSwitch(switches::kDisableES3APIs);
   gpu_preferences.use_passthrough_cmd_decoder =
       command_line->HasSwitch(switches::kUsePassthroughCmdDecoder);
   return gpu_preferences;
 }
 
 }  // namespace content