$OpenBSD: patch-ui_gl_sync_control_vsync_provider_cc,v 1.6 2017/01/26 17:08:26 robert Exp $
--- ui/gl/sync_control_vsync_provider.cc.orig.port	Tue Jan  3 20:51:20 2017
+++ ui/gl/sync_control_vsync_provider.cc	Tue Jan  3 20:52:13 2017
@@ -11,7 +11,7 @@
 #include "base/trace_event/trace_event.h"
 #include "build/build_config.h"
 
-#if defined(OS_LINUX) || defined(OS_WIN)
+#if defined(OS_LINUX) || defined(OS_WIN) || 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) || defined(OS_WIN)
+#if defined(OS_LINUX) || defined(OS_WIN) || 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) || defined(OS_WIN)
+#if defined(OS_LINUX) || defined(OS_WIN) || defined(OS_BSD)
   base::TimeTicks timebase;
 
   int64_t system_time;
@@ -132,7 +132,7 @@ void SyncControlVSyncProvider::GetVSyncParameters(
 #endif  // defined(OS_LINUX) || defined(OS_WIN)
 }
 
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) || defined(OS_BSD)
 bool SyncControlVSyncProvider::AdjustSyncValues(int64_t* system_time,
                                                 int64_t* media_stream_counter) {
   // Both Intel and Mali drivers will return TRUE for GetSyncValues
