[ Do not submit ] Prototype for invalidation analysis

Source/core/rendering/RenderObject.cpp

Index: Source/core/rendering/RenderObject.cpp
diff --git a/Source/core/rendering/RenderObject.cpp b/Source/core/rendering/RenderObject.cpp
index 5519d5f9be98e814ad1a4e8efb77bc87de1cf4b7..7fbb623f8e70846f1d17d02bed50f3dbdcd58a81 100644
--- a/Source/core/rendering/RenderObject.cpp
+++ b/Source/core/rendering/RenderObject.cpp
@@ -1490,6 +1490,10 @@ void RenderObject::invalidatePaintUsingContainer(const RenderLayerModelObject* p
     if (!isRooted())
         return;
 
+    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.invalidationTracking"),
+        "PaintInvalidationTracking",
+        "data", InspectorPaintInvalidationTrackingEvent::data(this, paintInvalidationContainer));
+
     TRACE_EVENT2(TRACE_DISABLED_BY_DEFAULT("blink.invalidation"), "RenderObject::invalidatePaintUsingContainer()",
         "object", this->debugName().ascii(),
         "info", jsonObjectForPaintInvalidationInfo(r, invalidationReasonToString(invalidationReason)));
@@ -1628,6 +1632,10 @@ InvalidationReason RenderObject::invalidatePaintIfNeeded(const RenderLayerModelO
     // crbug.com/393762
     ASSERT(newBounds == boundsRectForPaintInvalidation(&paintInvalidationContainer, &paintInvalidationState));
 
+    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.invalidationTracking"),
+        "PaintInvalidationTracking",
+        "data", InspectorPaintInvalidationTrackingEvent::data(this, &paintInvalidationContainer));
+
     TRACE_EVENT2(TRACE_DISABLED_BY_DEFAULT("blink.invalidation"), "RenderObject::invalidatePaintIfNeeded()",
         "object", this->debugName().ascii(),
         "info", jsonObjectForOldAndNewRects(oldBounds, newBounds));