mozilla-inbound: changeset 328816:850ff3e591469b48f4d7f7a06acc9d63738c1840

author	Kearwood Gilbert <kgilbert@mozilla.com>
	Fri, 06 Jan 2017 16:28:45 -0800
changeset 328816	850ff3e591469b48f4d7f7a06acc9d63738c1840
parent 328815	d2eccdc4a23256d51d2e32986a59b6ffadbafa19
child 328817	3a70d0266ffe932ab582756d43f4f5539c0e79f6
push id	85546
push user	kwierso@gmail.com
push date	Wed, 11 Jan 2017 02:36:30 +0000
treeherder	mozilla-inbound@c5bce4cd684a [default view] [failures only]
perfherder	[talos] [build metrics] [platform microbench] (compared to previous push)
reviewers	daoshengmu
bugs	1325810
milestone	53.0a1
first release with	nightly linux32 2963cf6be7f8 / 53.0a1 / 20170111030235 / files nightly linux64 2963cf6be7f8 / 53.0a1 / 20170111030235 / files nightly mac 2963cf6be7f8 / 53.0a1 / 20170111030235 / files nightly win32 2963cf6be7f8 / 53.0a1 / 20170111030235 / files nightly win64 2963cf6be7f8 / 53.0a1 / 20170111030235 / files
last release without	nightly linux32 e68cbc3b5b3d / 53.0a1 / 20170110075905 / files nightly linux64 e68cbc3b5b3d / 53.0a1 / 20170110075905 / files nightly mac e68cbc3b5b3d / 53.0a1 / 20170110075905 / files nightly win32 e68cbc3b5b3d / 53.0a1 / 20170110075905 / files nightly win64 e68cbc3b5b3d / 53.0a1 / 20170110075905 / files

--- a/gfx/vr/VRManager.cpp
+++ b/gfx/vr/VRManager.cpp
@@ -165,17 +165,19 @@ void
 VRManager::NotifyVsync(const TimeStamp& aVsyncTimestamp)
 {
   const double kVRDisplayRefreshMaxDuration = 5000; // milliseconds
 
   bool bHaveEventListener = false;
 
   for (auto iter = mVRManagerParents.Iter(); !iter.Done(); iter.Next()) {
     VRManagerParent *vmp = iter.Get()->GetKey();
-    Unused << vmp->SendNotifyVSync();
+    if (mVRDisplays.Count()) {
+      Unused << vmp->SendNotifyVSync();
+    }
     bHaveEventListener |= vmp->HaveEventListener();
   }
 
   for (auto iter = mVRDisplays.Iter(); !iter.Done(); iter.Next()) {
     gfx::VRDisplayHost* display = iter.UserData();
     display->NotifyVSync();
   }