Fix AutoReset in CooperativeSchedulingManager::RunNestedLoop

Bug: 965307
Change-Id: I57e35104a748ff5194a556ba212974114d2e59be
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1627431Reviewed-by: Alexander Timin <altimin@chromium.org>
Commit-Queue: Keishi Hattori <keishi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#662953}

third_party/blink/renderer/platform/scheduler/common/cooperative_scheduling_manager.cc

@@ -68,7 +68,7 @@ void CooperativeSchedulingManager::SafepointSlow() {
 void CooperativeSchedulingManager::RunNestedLoop() {
   TRACE_EVENT0("renderer.scheduler",
                "CooperativeSchedulingManager::RunNestedLoop");
-  base::AutoReset<bool>(&running_nested_loop_, true);
+  base::AutoReset<bool> nested_loop_scope(&running_nested_loop_, true);
   wait_until_ = WTF::CurrentTimeTicks() + kNestedLoopMinimumInterval;
 
   // TODO(keishi): Ask scheduler to run high priority tasks from different