[Telemetry] Remove action_runner.BeginGestureInteraction.

tools/perf/page_sets/key_desktop_move_cases.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.page import page as page_module
 from telemetry.page import page_set as page_set_module
 
 
 class KeyDesktopMoveCasesPage(page_module.Page):
 
   def __init__(self, url, page_set, name='', credentials=None):
@@ skipping 33 matching lines @@
 
   def RunPageInteractions(self, action_runner):
     action_runner.ExecuteJavaScript('''
         gmonkey.load('2.0', function(api) {
           window.__scrollableElementForTelemetry = api.getScrollableElement();
         });''')
     action_runner.WaitForJavaScriptCondition(
         'window.__scrollableElementForTelemetry != null')
     scrollbar_x, start_y, end_y = self._CalculateScrollBarRatios(action_runner)
 
-    interaction = action_runner.BeginGestureInteraction(
-        'DragAction')
-    action_runner.DragPage(left_start_ratio=scrollbar_x,
-        top_start_ratio=start_y, left_end_ratio=scrollbar_x,
-        top_end_ratio=end_y, speed_in_pixels_per_second=100,
-        element_function='window.__scrollableElementForTelemetry')
-    interaction.End()
+    with action_runner.CreateGestureInteraction('DragAction'):
+      action_runner.DragPage(left_start_ratio=scrollbar_x,
+          top_start_ratio=start_y, left_end_ratio=scrollbar_x,
+          top_end_ratio=end_y, speed_in_pixels_per_second=100,
+          element_function='window.__scrollableElementForTelemetry')
 
   def _CalculateScrollBarRatios(self, action_runner):
     viewport_height = float(action_runner.EvaluateJavaScript(
         'window.__scrollableElementForTelemetry.clientHeight'))
     content_height = float(action_runner.EvaluateJavaScript(
         'window.__scrollableElementForTelemetry.scrollHeight'))
     viewport_width = float(action_runner.EvaluateJavaScript(
         'window.__scrollableElementForTelemetry.offsetWidth'))
     scrollbar_width = float(action_runner.EvaluateJavaScript('''
         window.__scrollableElementForTelemetry.offsetWidth -
@@ skipping 43 matching lines @@
 
   """ Special cases for move gesture """
 
   def __init__(self):
     super(KeyDesktopMoveCasesPageSet, self).__init__(
       archive_data_file='data/key_desktop_move_cases.json',
       bucket=page_set_module.PARTNER_BUCKET)
 
     self.AddUserStory(GmailMouseScrollPage(self))
     self.AddUserStory(GoogleMapsPage(self))