Simulate interactivity boost for simulated user input events

telemetry/telemetry/internal/actions/mouse_click.py

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 from telemetry.internal.actions import page_action
 from telemetry.internal.actions import utils
 
 
 class MouseClickAction(page_action.PageAction):
   def __init__(self, selector=None):
     super(MouseClickAction, self).__init__()
     self._selector = selector
 
   def WillRunAction(self, tab):
     """Load the mouse click JS code prior to running the action."""
     super(MouseClickAction, self).WillRunAction(tab)
     utils.InjectJavaScript(tab, 'mouse_click.js')
     tab.ExecuteJavaScript("""
         window.__mouseClickActionDone = false;
         window.__mouseClickAction = new __MouseClickAction(function() {
           window.__mouseClickActionDone = true;
         });""")
 
+  def SimulatesUserInput(self):
+    return True
+
   def RunAction(self, tab):
     code = '''
         function(element, info) {
           if (!element) {
             throw Error('Cannot find element: ' + info);
           }
           window.__mouseClickAction.start({
             element: element
           });
         }'''
     page_action.EvaluateCallbackWithElement(
         tab, code, selector=self._selector)
     tab.WaitForJavaScriptCondition('window.__mouseClickActionDone', timeout=60)