Simulate interactivity boost for simulated user input events

telemetry/telemetry/internal/actions/scroll.py

Index: telemetry/telemetry/internal/actions/scroll.py
diff --git a/telemetry/telemetry/internal/actions/scroll.py b/telemetry/telemetry/internal/actions/scroll.py
index dc4f1659df7e3035e0b448b134e1be8095bc10fc..f14c7da22dbe01e84189f4927d35bf7a5348fae6 100644
--- a/telemetry/telemetry/internal/actions/scroll.py
+++ b/telemetry/telemetry/internal/actions/scroll.py
@@ -40,6 +40,9 @@ class ScrollAction(page_action.PageAction):
       self._distance_func = js_template.Render(
           'function() { return 0 + {{ @expr }}; }', expr=distance_expr)
 
+  def SimulatesUserInput(self):
+    return True
+
   def WillRunAction(self, tab):
     if self._direction in ('downleft', 'downright', 'upleft', 'upright'):
       # Diagonal scrolling support was added in Chrome branch number 2332.