Update ASYNC trace events to NESTABLE

ASYNC* version is deprecated. No functional change should be visible in
trace.
Perf sheriffs: This might affect input latency metrics in telemetry.

Change-Id: I2fdadeb4ae8c72af28e39a35927cb995408ee995
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2625968
Auto-Submit: ssid <ssid@chromium.org>
Commit-Queue: Sadrul Chowdhury <sadrul@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844104}

cc/mojo_embedder/async_layer_tree_frame_sink.cc

@@ -275,9 +275,10 @@ void AsyncLayerTreeFrameSink::OnNeedsBeginFrames(bool needs_begin_frames) {
   DCHECK(compositor_frame_sink_ptr_);
   if (needs_begin_frames_ != needs_begin_frames) {
     if (needs_begin_frames_) {
-      TRACE_EVENT_ASYNC_END0("cc,benchmark", "NeedsBeginFrames", this);
+      TRACE_EVENT_NESTABLE_ASYNC_END0("cc,benchmark", "NeedsBeginFrames", this);
     } else {
-      TRACE_EVENT_ASYNC_BEGIN0("cc,benchmark", "NeedsBeginFrames", this);
+      TRACE_EVENT_NESTABLE_ASYNC_BEGIN0("cc,benchmark", "NeedsBeginFrames",
+                                        this);
     }
   }
   needs_begin_frames_ = needs_begin_frames;