DevTools: Make FilmStripView support custom status text.

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 563489b0e7f4a748e89d74fccd9f50b328cb64a4..a533ba832d2d4284dff23284e0404f6f703c1563 100644
--- a/Source/devtools/front_end/network/NetworkPanel.js
+++ b/Source/devtools/front_end/network/NetworkPanel.js
@@ -287,7 +287,7 @@ WebInspector.NetworkPanel.prototype = {
         this._overviewPane.reset();
         this._networkLogView.reset();
         if (this._filmStripView)
-            this._filmStripView.reset();
+            this._resetFilmStripView();
     },
 
     /**
@@ -338,6 +338,7 @@ WebInspector.NetworkPanel.prototype = {
             this._filmStripView.addEventListener(WebInspector.FilmStripView.Events.FrameSelected, this._onFilmFrameSelected, this);
             this._filmStripView.addEventListener(WebInspector.FilmStripView.Events.FrameEnter, this._onFilmFrameEnter, this);
             this._filmStripView.addEventListener(WebInspector.FilmStripView.Events.FrameExit, this._onFilmFrameExit, this);
+            this._resetFilmStripView();
         }
 
         if (!toggled && this._filmStripRecorder) {
@@ -347,6 +348,12 @@ WebInspector.NetworkPanel.prototype = {
         }
     },
 
+    _resetFilmStripView: function()
+    {
+        this._filmStripView.reset();
+        this._filmStripView.setStatusText(WebInspector.UIString("No frames recorded. Reload page to start recording."));
+    },
+
     /**
      * @return {boolean}
      */
@@ -769,7 +776,8 @@ WebInspector.NetworkPanel.FilmStripRecorder.prototype = {
         this._target = WebInspector.targetManager.mainTarget();
         this._tracingModel = new WebInspector.TracingModel(new WebInspector.TempFileBackingStorage("tracing"));
         this._target.tracingManager.start(this, "-*,disabled-by-default-devtools.screenshot", "");
-        this._filmStripView.setRecording();
+        this._filmStripView.reset();
+        this._filmStripView.setStatusText(WebInspector.UIString("Recording frames..."));
     },
 
     /**
@@ -791,6 +799,6 @@ WebInspector.NetworkPanel.FilmStripRecorder.prototype = {
         this._target.tracingManager.stop();
         this._target = null;
         this._callback = callback;
-        this._filmStripView.setFetching();
+        this._filmStripView.setStatusText(WebInspector.UIString("Fetching frames..."));
     }
 }