DevTools: Switch network panel back to frame-based filmstrip.

Source/devtools/front_end/network/NetworkPanel.js

Index: Source/devtools/front_end/network/NetworkPanel.js
diff --git a/Source/devtools/front_end/network/NetworkPanel.js b/Source/devtools/front_end/network/NetworkPanel.js
index 7ced99d3083f3abd9a18e6f0f4cffa9b2ba092fe..99dee59eba2df8b57006586664f0d49bf5acd319 100644
--- a/Source/devtools/front_end/network/NetworkPanel.js
+++ b/Source/devtools/front_end/network/NetworkPanel.js
@@ -266,6 +266,7 @@ WebInspector.NetworkPanel.prototype = {
         var toggled = this._networkRecordFilmStripSetting.get();
         if (toggled && !this._filmStripRecorder) {
             this._filmStripView = new WebInspector.FilmStripView();
+            this._filmStripView.setMode(WebInspector.FilmStripView.Modes.FrameBased);
             this._filmStripView.element.classList.add("network-film-strip");
             this._filmStripRecorder = new WebInspector.NetworkPanel.FilmStripRecorder(this._filmStripView);
             this._filmStripView.show(this._searchableView.element, this._searchableView.element.firstElementChild);