$OpenBSD: patch-ui_gl_sync_control_vsync_provider_cc,v 1.5 2016/10/27 18:30:41 robert Exp $
--- ui/gl/sync_control_vsync_provider.cc.orig.port	Thu Sep  1 11:38:47 2016
+++ ui/gl/sync_control_vsync_provider.cc	Thu Sep  1 11:39:07 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;
@@ -26,7 +26,7 @@ const double kRelativeIntervalDifferenceThreshold = 0.
 namespace gl {
 
 SyncControlVSyncProvider::SyncControlVSyncProvider() : gfx::VSyncProvider() {
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_BSD)
   // On platforms where we can't get an accurate reading on the refresh
   // rate we fall back to the assumption that we're displaying 60 frames
   // per second.
@@ -39,7 +39,7 @@ 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
