Clear selected flame chart entry when overview window is being dragged

BUG=361045
R=loislo@chromium.org

Review URL: https://codereview.chromium.org/305963006

git-svn-id: svn://svn.chromium.org/blink/trunk@175111 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/devtools/front_end/timeline/TimelineFlameChart.js

@@ -920,6 +920,7 @@ WebInspector.TimelineFlameChart.prototype = {
     setWindowTimes: function(startTime, endTime)
     {
         this._mainView.setWindowTimes(startTime, endTime);
+        this._delegate.select(null);
     },
 
     /**