DevTools: don't change current selection on Timeline flame chart when overview window changes

Source/devtools/front_end/timeline/TimelinePanel.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 Intel 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.
@@ skipping 967 matching lines @@
     performSearch: function(searchConfig, shouldJump, jumpBackwards)
     {
         var query = searchConfig.query;
         this._searchRegex = createPlainTextSearchRegex(query, "i");
         delete this._searchResults;
         this._updateSearchHighlight(true, shouldJump, jumpBackwards);
     },
 
     _updateSelectionDetails: function()
     {
-        if (!this._selection)
-            this._selection = WebInspector.TimelineSelection.fromRange(this._windowStartTime, this._windowEndTime);
+        if (!this._selection) {
+            if (this._tracingTimelineModel && this._flameChartEnabledSetting.get()) {
+                 this.showInDetails(this.element.ownerDocument.createElement("div"));
+                 return;
+            } else {
+                 this._selection = WebInspector.TimelineSelection.fromRange(this._windowStartTime, this._windowEndTime);
+            }
+        }
 
         switch (this._selection.type()) {
         case WebInspector.TimelineSelection.Type.Record:
             var record = /** @type {!WebInspector.TimelineModel.Record} */ (this._selection.object());
             if (this._tracingTimelineModel) {
                 var event = record.traceEvent();
                 this._uiUtils.generateDetailsContent(record, this._model, this._detailsLinkifier, this._appendDetailsTabsForTraceEventAndShowDetails.bind(this, event));
                 break;
             }
             this._uiUtils.generateDetailsContent(record, this._model, this._detailsLinkifier, this.showInDetails.bind(this));
@@ skipping 520 matching lines @@
 
 WebInspector.TimelinePanelFactory.prototype = {
     /**
      * @return {!WebInspector.Panel}
      */
     createPanel: function()
     {
         return WebInspector.TimelinePanel._instance();
     }
 }