Adding support for diagonal scrolling to telemetry.

tools/telemetry/telemetry/page/actions/scroll.py

 # Copyright 2012 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 os
 
 from telemetry.page.actions import page_action
 
 
 class ScrollAction(page_action.PageAction):
   # TODO(chrishenry): Ignore attributes, to be deleted when usage in
   # other repo is cleaned up.
   def __init__(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):
     super(ScrollAction, self).__init__()
-    if direction not in ['down', 'up', 'left', 'right']:
+    if direction not in ['down', 'up', 'left', 'right',
+                         'downleft', 'downright',
+                         'upleft', 'upright']:
       raise page_action.PageActionNotSupported(
           'Invalid scroll direction: %s' % self.direction)
     self._selector = selector
     self._text = text
     self._element_function = element_function
     self._left_start_ratio = left_start_ratio
     self._top_start_ratio = top_start_ratio
     self._direction = direction
     self._speed = speed_in_pixels_per_second
     self._use_touch = use_touch
@@ skipping 58 matching lines @@
           });
         }''' % (self._left_start_ratio,
                 self._top_start_ratio,
                 self._direction,
                 self._speed,
                 gesture_source_type)
     page_action.EvaluateCallbackWithElement(
         tab, code, selector=self._selector, text=self._text,
         element_function=self._element_function)
     tab.WaitForJavaScriptExpression('window.__scrollActionDone', 60)