DevTools: Make item info follow the mouse on the flame chart.

third_party/WebKit/Source/devtools/front_end/ui_lazy/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 673 matching lines @@
 
         if (!this._enabled())
             return;
 
         if (this._isDragging)
             return;
 
         var inDividersBar = event.offsetY < WebInspector.FlameChart.DividersBarHeight;
         this._highlightedMarkerIndex = inDividersBar ? this._markerIndexAtPosition(event.offsetX) : -1;
         this._updateMarkerHighlight();
+        this._entryInfo.style.left = event.offsetX + "px";
+        this._entryInfo.style.top = event.offsetY + "px";
 
         this._highlightEntry(this._coordinatesToEntryIndex(event.offsetX, event.offsetY));
     },
 
     _onMouseOut: function()
     {
         this._highlightEntry(-1);
     },
 
     /**
@@ skipping 684 matching lines @@
     /**
      * @param {!Array<!{title: string, value: (string|!Element)}>} entryInfo
      * @return {!Element}
      */
     _buildEntryInfo: function(entryInfo)
     {
         var infoTable = createElementWithClass("table", "info-table");
         for (var entry of entryInfo) {
             var row = infoTable.createChild("tr");
             row.createChild("td", "title").textContent = entry.title;
-            row.createChild("td").textContent = typeof entry.value === "string" ? entry.value : entry.value.textContent;
+            if (typeof entry.value === "string")
+                row.createChild("td").textContent = entry.value;
+            else
+                row.createChild("td").appendChild(entry.value);
         }
         return infoTable;
     },
 
     /**
      * @param {!CanvasRenderingContext2D} context
      * @param {string} title
      * @param {number} maxSize
      * @return {string}
      */
@@ skipping 130 matching lines @@
         this.update();
     },
 
     _enabled: function()
     {
         return this._rawTimelineDataLength !== 0;
     },
 
     __proto__: WebInspector.HBox.prototype
 }