tracing: Replace uses of TRACE_EVENT_ASYNC* in blink/

The deprecated TRACE_EVENT_ASYNC* macros have been superseded by
TRACE_EVENT_NESTABLE_ASYNC*.

Part 2, another event was added recently.

Bug: 1038710
TBR: vmpstr@chromium.org
Change-Id: Ic8e1e8b2e479bbd5f7f590f5b30123d1e5dff63e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2038735Reviewed-by: Eric Seckler <eseckler@chromium.org>
Reviewed-by: Sami Kyöstilä <skyostil@chromium.org>
Commit-Queue: Eric Seckler <eseckler@chromium.org>
Cr-Commit-Position: refs/heads/master@{#738594}

third_party/blink/renderer/core/display_lock/display_lock_context.cc

@@ -499,7 +499,7 @@ DisplayLockContext::GetScopedForcedUpdate() {
 
   DCHECK(!update_forced_);
   update_forced_ = true;
-  TRACE_EVENT_ASYNC_BEGIN0(
+  TRACE_EVENT_NESTABLE_ASYNC_BEGIN0(
       TRACE_DISABLED_BY_DEFAULT("blink.debug.display_lock"), "LockForced",
       TRACE_ID_LOCAL(this));
 
@@ -516,8 +516,9 @@ DisplayLockContext::GetScopedForcedUpdate() {
 void DisplayLockContext::NotifyForcedUpdateScopeEnded() {
   DCHECK(update_forced_);
   update_forced_ = false;
-  TRACE_EVENT_ASYNC_END0(TRACE_DISABLED_BY_DEFAULT("blink.debug.display_lock"),
-                         "LockForced", TRACE_ID_LOCAL(this));
+  TRACE_EVENT_NESTABLE_ASYNC_END0(
+      TRACE_DISABLED_BY_DEFAULT("blink.debug.display_lock"), "LockForced",
+      TRACE_ID_LOCAL(this));
 }
 
 void DisplayLockContext::StartCommit() {