DevTools: properly update paint profiler upon new event being set

Source/devtools/front_end/timeline/TimelinePaintProfilerView.js

Index: Source/devtools/front_end/timeline/TimelinePaintProfilerView.js
diff --git a/Source/devtools/front_end/timeline/TimelinePaintProfilerView.js b/Source/devtools/front_end/timeline/TimelinePaintProfilerView.js
index 9f2b0a9ac427efddb04d9007707b90af1171eabe..d206a89cdcb8e4c93e40f82f90a6c803c23113e8 100644
--- a/Source/devtools/front_end/timeline/TimelinePaintProfilerView.js
+++ b/Source/devtools/front_end/timeline/TimelinePaintProfilerView.js
@@ -49,7 +49,10 @@ WebInspector.TimelinePaintProfilerView.prototype = {
         this._target = target;
         this._event = event;
 
-        this._updateWhenVisible = true;
+        if (this.isShowing())
+            this._update();
+        else
+            this._updateWhenVisible = true;
 
         if (this._event.name === WebInspector.TimelineModel.RecordType.Paint)
             return !!event.picture;