Enable zero-copy DXGI video by default.

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 33 matching lines @@
       command_line->HasSwitch(switches::kDisableVaapiAcceleratedVideoEncode);
 #endif
 #if defined(ENABLE_WEBRTC)
   gpu_preferences.disable_web_rtc_hw_encoding =
       command_line->HasSwitch(switches::kDisableWebRtcHWEncoding);
 #endif
 #if defined(OS_WIN)
   gpu_preferences.enable_accelerated_vpx_decode =
       command_line->HasSwitch(switches::kEnableAcceleratedVpxDecode);
   gpu_preferences.enable_zero_copy_dxgi_video =
-      command_line->HasSwitch(switches::kEnableZeroCopyDxgiVideo);
+      !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 =
       command_line->HasSwitch(switches::kDisableGLSLTranslator);
   gpu_preferences.disable_gpu_driver_bug_workarounds =
@@ skipping 33 matching lines @@
   gpu_preferences.enable_gpu_service_tracing =
       command_line->HasSwitch(switches::kEnableGPUServiceTracing);
   gpu_preferences.enable_unsafe_es3_apis =
       command_line->HasSwitch(switches::kEnableUnsafeES3APIs);
   gpu_preferences.use_passthrough_cmd_decoder =
       command_line->HasSwitch(switches::kUsePassthroughCmdDecoder);
   return gpu_preferences;
 }
 
 }  // namespace content