WebVR: process animations from posted task to yield for other events

chrome/browser/android/vr_shell/vr_shell_gl.cc

Index: chrome/browser/android/vr_shell/vr_shell_gl.cc
diff --git a/chrome/browser/android/vr_shell/vr_shell_gl.cc b/chrome/browser/android/vr_shell/vr_shell_gl.cc
index 336d2b0472f4ce8c03bafe98d7629b20023598a8..ae068e4e7b93bc407e1298cacfd1f800272a4653 100644
--- a/chrome/browser/android/vr_shell/vr_shell_gl.cc
+++ b/chrome/browser/android/vr_shell/vr_shell_gl.cc
@@ -1130,10 +1130,10 @@ void VrShellGl::UpdateScene(std::unique_ptr<base::ListValue> commands) {
 
 void VrShellGl::SendVSync(base::TimeDelta time,
                           const GetVSyncCallback& callback) {
-  TRACE_EVENT0("input", "VrShellGl::SendVSync");
-
   uint8_t frame_index = frame_index_++;
 
+  TRACE_EVENT1("input", "VrShellGl::SendVSync", "frame", frame_index);
+
   gvr::ClockTimePoint target_time = gvr::GvrApi::GetTimePointNow();
   target_time.monotonic_system_time_nanos += kPredictionTimeWithoutVsyncNanos;