smoothness.scrolling_tough_ad_cases to use browser driven scrolls

tools/telemetry/telemetry/page/action_runner.py

 # Copyright 2014 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.
 
 import logging
 import time
 import urlparse
 
 from telemetry.internal.actions.drag import DragAction
 from telemetry.internal.actions.javascript_click import ClickElementAction
 from telemetry.internal.actions.load_media import LoadMediaAction
 from telemetry.internal.actions.loop import LoopAction
 from telemetry.internal.actions.mouse_click import MouseClickAction
 from telemetry.internal.actions.navigate import NavigateAction
 from telemetry.internal.actions.page_action import GESTURE_SOURCE_DEFAULT
 from telemetry.internal.actions.page_action import SUPPORTED_GESTURE_SOURCES
 from telemetry.internal.actions.pinch import PinchAction
 from telemetry.internal.actions.play import PlayAction
 from telemetry.internal.actions.repaint_continuously import (
     RepaintContinuouslyAction)
+from telemetry.internal.actions.repeatable_scroll import RepeatableScrollAction
 from telemetry.internal.actions.scroll import ScrollAction
 from telemetry.internal.actions.scroll_bounce import ScrollBounceAction
 from telemetry.internal.actions.seek import SeekAction
 from telemetry.internal.actions.swipe import SwipeAction
 from telemetry.internal.actions.tap import TapAction
 from telemetry.internal.actions.wait import WaitForElementAction
 from telemetry.web_perf import timeline_interaction_record
 
 
 class ActionRunner(object):
@@ skipping 320 matching lines @@
       synthetic_gesture_source: the source input device type for the
           synthetic gesture: 'DEFAULT', 'TOUCH' or 'MOUSE'.
     """
     assert synthetic_gesture_source in SUPPORTED_GESTURE_SOURCES
     self._RunAction(ScrollAction(
         left_start_ratio=left_start_ratio, top_start_ratio=top_start_ratio,
         direction=direction, distance=distance, distance_expr=distance_expr,
         speed_in_pixels_per_second=speed_in_pixels_per_second,
         use_touch=use_touch, synthetic_gesture_source=synthetic_gesture_source))
 
+  def RepeatableBrowserDrivenScroll(self, x_scroll_distance_ratio=0.0,
+                                    y_scroll_distance_ratio=0.5,
+                                    repeat_count=0,
+                                    repeat_delay_ms=250):
+    """Perform a browser driven repeatable scroll gesture.
+
+    The scroll gesture is driven from the browser, this is useful because the
+    main thread often isn't resposive but the browser process usually is, so the
+    delay between the scroll gestures should be consistent.
+
+    Args:
+      x_scroll_distance_ratio: The horizontal lenght of the scroll as a fraction
+          of the screen width.
+      y_scroll_distance_ratio: The vertical lenght of the scroll as a fraction
+          of the screen height.
+      repeat_count: The number of additional times to repeat the gesture.
+      repeat_delay_ms: The delay in milliseconds between each scroll gesture.
+    """
+    self._RunAction(RepeatableScrollAction(
+        x_scroll_distance_ratio=x_scroll_distance_ratio,
+        y_scroll_distance_ratio=y_scroll_distance_ratio,
+        repeat_count=repeat_count,
+        repeat_delay_ms=repeat_delay_ms))
+
   def ScrollElement(self, selector=None, text=None, element_function=None,
                     left_start_ratio=0.5, top_start_ratio=0.5,
                     direction='down', distance=None, distance_expr=None,
                     speed_in_pixels_per_second=800, use_touch=False,
                     synthetic_gesture_source=GESTURE_SOURCE_DEFAULT):
     """Perform scroll gesture on the element.
 
     The element may be selected via selector, text, or element_function.
     Only one of these arguments must be specified.
 
@@ skipping 308 matching lines @@
     self._action_runner.ExecuteJavaScript('console.time("%s");' %
         timeline_interaction_record.GetJavaScriptMarker(
             self._label, self._flags))
 
   def End(self):
     assert self._started
     self._started = False
     self._action_runner.ExecuteJavaScript('console.timeEnd("%s");' %
         timeline_interaction_record.GetJavaScriptMarker(
             self._label, self._flags))