Limit D3D V-sync experiment to Win 8.1+

content/browser/compositor/gpu_process_transport_factory.cc

Index: content/browser/compositor/gpu_process_transport_factory.cc
diff --git a/content/browser/compositor/gpu_process_transport_factory.cc b/content/browser/compositor/gpu_process_transport_factory.cc
index 409df107103e240691ea5fac8bcee2c367f07d17..1c2caa72fa1b8564bc281278c5de212cd3695932 100644
--- a/content/browser/compositor/gpu_process_transport_factory.cc
+++ b/content/browser/compositor/gpu_process_transport_factory.cc
@@ -116,9 +116,9 @@ constexpr uint32_t kDefaultClientId = 0u;
 
 bool IsGpuVSyncSignalSupported() {
 #if defined(OS_WIN)
-  // 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);
 #else
   return false;