cc: Disable Renderer latency recovery with --disable-gpu-vsync

cc/scheduler/scheduler.cc

Index: cc/scheduler/scheduler.cc
diff --git a/cc/scheduler/scheduler.cc b/cc/scheduler/scheduler.cc
index 2b668e830114d89feb28844e8fc2a8030ae8a639..425266335707656becfbd24cd6e42ef697ce48a6 100644
--- a/cc/scheduler/scheduler.cc
+++ b/cc/scheduler/scheduler.cc
@@ -768,6 +768,12 @@ bool Scheduler::ShouldRecoverMainLatency(const BeginFrameArgs& args) const {
 bool Scheduler::ShouldRecoverImplLatency(const BeginFrameArgs& args) const {
   DCHECK(!settings_.using_synchronous_renderer_compositor);
 
+  // Disable impl thread latency recovery when using the unthrottled
+  // begin frame source since we will always get a BeginFrame before
+  // the swap ack and our heuristics below will not work.
+  if (!throttle_frame_production_)
+    return false;
+
   // If we are swap throttled at the BeginFrame, that means the impl thread is
   // very likely in a high latency mode.
   bool impl_thread_is_likely_high_latency = state_machine_.SwapThrottled();