Limit D3D V-sync experiment to Win 8.1+

gpu/ipc/service/image_transport_surface_win.cc

 // 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.
 
 #include "gpu/ipc/service/image_transport_surface.h"
 
 #include <memory>
 
 #include "base/metrics/histogram_macros.h"
 #include "base/win/windows_version.h"
 #include "gpu/ipc/service/child_window_surface_win.h"
 #include "gpu/ipc/service/direct_composition_surface_win.h"
 #include "gpu/ipc/service/gpu_vsync_provider_win.h"
 #include "gpu/ipc/service/pass_through_image_transport_surface.h"
 #include "gpu/ipc/service/switches.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_surface_egl.h"
 #include "ui/gl/gl_switches.h"
 #include "ui/gl/init/gl_factory.h"
 #include "ui/gl/vsync_provider_win.h"
 
 namespace gpu {
 
 namespace {
 bool IsGpuVSyncSignalSupported() {
-  // TODO(stanisc): http://crbug.com/467617 Limit to Windows 8+ for now because
-  // of locking issue caused by waiting for VSync on Win7.
-  return base::win::GetVersion() >= base::win::VERSION_WIN8 &&
+  // TODO(stanisc): http://crbug.com/467617 Limit to Windows 8.1+ for now
+  // because of locking issue caused by waiting for VSync on Win7 and Win 8.0.
+  return base::win::GetVersion() >= base::win::VERSION_WIN8_1 &&
          base::FeatureList::IsEnabled(features::kD3DVsync);
 }
 
 }  // namespace
 
 // static
 scoped_refptr<gl::GLSurface> ImageTransportSurface::CreateNativeSurface(
     base::WeakPtr<ImageTransportSurfaceDelegate> delegate,
     SurfaceHandle surface_handle,
     gl::GLSurfaceFormat format) {
@@ skipping 44 matching lines @@
     surface = gl::init::CreateViewGLSurface(surface_handle);
     if (!surface)
       return nullptr;
   }
 
   return scoped_refptr<gl::GLSurface>(new PassThroughImageTransportSurface(
       delegate, surface.get(), multi_window_swap_interval));
 }
 
 }  // namespace gpu