Simulate interactivity boost for simulated user input events

telemetry/telemetry/internal/actions/page_action.py

Index: telemetry/telemetry/internal/actions/page_action.py
diff --git a/telemetry/telemetry/internal/actions/page_action.py b/telemetry/telemetry/internal/actions/page_action.py
index d85d47aac75efc9757cf0b319f13577becd43f67..cb392e3b157293fb2eb8690588999c315e9af6f4 100644
--- a/telemetry/telemetry/internal/actions/page_action.py
+++ b/telemetry/telemetry/internal/actions/page_action.py
@@ -27,6 +27,16 @@ class PageAction(object):
 
   __metaclass__ = trace_event.TracedMetaClass
 
+  def SimulatesUserInput(self):
+    """On some platforms (e.g. ChromeOS), the kernel provides a frequency boost
+    to the CPUs when an input is received (e.g., keypress, touchpad event).
+    Page actions which simulate a user input therefore need to trigger the
+    same boost in order to accurately simulate normal behaviour.
+
+    This should be overridden by actions which simulate user input.
+    """
+    return False
+
   def WillRunAction(self, tab):
     """Override to do action-specific setup before
     Test.WillRunAction is called."""