[Invalidation Tracking] add TraceEvents for setNeedsStyleRecalc.

Source/core/dom/Node.cpp

Index: Source/core/dom/Node.cpp
diff --git a/Source/core/dom/Node.cpp b/Source/core/dom/Node.cpp
index 5df8962d61a0a0fb520f489bfaf11145c4455505..1cfe77ad52bdfe7c18aeb0bf81e946b6d031f061 100644
--- a/Source/core/dom/Node.cpp
+++ b/Source/core/dom/Node.cpp
@@ -712,6 +712,12 @@ void Node::setNeedsStyleRecalc(StyleChangeType changeType, const StyleChangeReas
     if (!inActiveDocument())
         return;
 
+    TRACE_EVENT_INSTANT1(
+        TRACE_DISABLED_BY_DEFAULT("devtools.timeline.invalidationTracking"),
+        "StyleRecalcInvalidationTracking",
+        "data",
+        InspectorStyleRecalcInvalidationTrackingEvent::data(this, reason));
+
     StyleChangeType existingChangeType = styleChangeType();
     if (changeType > existingChangeType)
         setStyleChange(changeType);