DevTools: Draw screenshot independently of frames bar on flamechart.

third_party/WebKit/Source/devtools/front_end/perf_ui/FlameChart.js

 /**
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 1102 matching lines @@
         var parentGroupIsVisible = groupStack.peekLast().visible;
         visible = thisGroupIsVisible && parentGroupIsVisible;
         groupStack.push({nestingLevel: style.nestingLevel, visible: visible});
         if (parentGroupIsVisible)
           currentOffset += nextLevel ? 0 : style.padding;
         this._groupOffsets[groupIndex] = currentOffset;
         if (parentGroupIsVisible && !style.shareHeaderLine)
           currentOffset += style.height;
       }
       var isFirstOnLevel = groupIndex >= 0 && level === groups[groupIndex].startLevel;
-      var thisLevelIsVisible = visible || isFirstOnLevel && groups[groupIndex].style.useFirstLineForOverview;
+      var thisLevelIsVisible =
+          parentGroupIsVisible && (visible || isFirstOnLevel && groups[groupIndex].style.useFirstLineForOverview);
       if (level < levelCount) {
         var height;
         if (groupIndex >= 0) {
           var group = groups[groupIndex];
           var style = group.style;
           height = isFirstOnLevel && !style.shareHeaderLine || !group.expanded ? style.height :
                                                                                  (style.itemsHeight || this._barHeight);
         } else {
           height = this._barHeight;
         }
@@ skipping 494 matching lines @@
   }
 
   /**
    * @override
    * @return {number}
    */
   boundarySpan() {
     return this._maximumBoundaries - this._minimumBoundaries;
   }
 };