$OpenBSD: patch-ui_gl_sync_control_vsync_provider_cc,v 1.3 2016/03/06 10:51:14 robert Exp $
--- ui/gl/sync_control_vsync_provider.cc.orig.port	Wed Feb 24 00:02:06 2016
+++ ui/gl/sync_control_vsync_provider.cc	Thu Mar  3 09:43:26 2016
@@ -11,7 +11,7 @@
 #include "base/trace_event/trace_event.h"
 #include "build/build_config.h"
 
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_BSD)
 // These constants define a reasonable range for a calculated refresh interval.
 // Calculating refreshes out of this range will be considered a fatal error.
 const int64_t kMinVsyncIntervalUs = base::Time::kMicrosecondsPerSecond / 400;
@@ -38,7 +38,7 @@ SyncControlVSyncProvider::~SyncControlVSyncProvider() 
 void SyncControlVSyncProvider::GetVSyncParameters(
     const UpdateVSyncCallback& callback) {
   TRACE_EVENT0("gpu", "SyncControlVSyncProvider::GetVSyncParameters");
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_BSD)
   base::TimeTicks timebase;
 
   // The actual clock used for the system time returned by glXGetSyncValuesOML
