Enable ChromeDriver test testActionsMultiTouchPoint

I have made some change to support multi touch point actions, so we can
try to enable this test again to see if it is no longer flaky.

Bug: 1011225
Change-Id: I3b896e6afc842f4bb0e78c2f9f900c4d5e0a8c9c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1946986Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: Lan Wei <lanwei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720705}

chrome/test/chromedriver/test/run_py_tests.py

@@ -78,8 +78,6 @@ _NEGATIVE_FILTER = [
     'ChromeDriverTest.testAlertOnNewWindow',
     # https://bugs.chromium.org/p/chromedriver/issues/detail?id=2532
     'ChromeDriverPageLoadTimeoutTest.testRefreshWithPageLoadTimeout',
-    # https://bugs.chromium.org/p/chromium/issues/detail?id=1011225
-    'ChromeDriverTest.testActionsMultiTouchPoint',
 ]