Sheriffing: update some flaky failing tests

third_party/WebKit/LayoutTests/TestExpectations

 # This is the main failure suppression file for Blink LayoutTests.
 # Further documentation:
 # https://chromium.googlesource.com/chromium/src/+/master/docs/testing/layout_test_expectations.md
 
 # Intentional failures to test the layout test system.
 Bug(intentional) harness-tests/crash.html [ Crash ]
 Bug(intentional) harness-tests/timeout.html [ Timeout ]
 
 # TODO(qyearsley): Remove these lines and uncomment other test expectation
 # lines related to CSS tests (crbug.com/706118).
@@ skipping 1867 matching lines @@
 crbug.com/613672 [ Mac ] external/wpt/pointerevents/pointerevent_touch-action-inherit_parent-none_touch-manual.html  [ Skip ]
 crbug.com/613672 [ Mac ] external/wpt/pointerevents/pointerevent_touch-action-inherit_child-none_touch-manual.html  [ Skip ]
 crbug.com/613672 [ Mac ] external/wpt/pointerevents/pointerevent_touch-action-inherit_child-pan-x-child-pan-y_touch-manual.html  [ Skip ]
 crbug.com/613672 [ Mac ] external/wpt/pointerevents/pointerevent_touch-action-inherit_child-auto-child-none_touch-manual.html  [ Skip ]
 crbug.com/613672 [ Mac ] fast/events/synthetic-events/tap-on-scaled-screen.html  [ Skip ]
 crbug.com/613672 [ Mac ] virtual/scalefactor150/fast/events/synthetic-events/tap-on-scaled-screen.html  [ Skip ]
 
 # We should send PointerLeave events for stylus devices.
 crbug.com/583413 external/wpt/pointerevents/pointerevent_pointerleave_pen-manual.html  [ Failure ]
 
-# Times out flakily.
-crbug.com/722212 fast/events/pointerevents/mouse-pointer-event-properties.html [ Timeout Pass ]
-
 # These testcases are incorrect, mark them as failing until they're fixed in the testsuite.
 # https://lists.w3.org/Archives/Public/www-style/2016Jan/0275.html
 # https://lists.w3.org/Archives/Public/www-style/2016Jan/0276.html
 crbug.com/249112 external/wpt/css/css-flexbox-1/flex-minimum-height-flex-items-005.xht [ Failure ]
 crbug.com/249112 external/wpt/css/css-flexbox-1/flex-minimum-height-flex-items-007.xht [ Failure ]
 crbug.com/249112 external/wpt/css/css-flexbox-1/flex-minimum-width-flex-items-005.xht [ Failure ]
 crbug.com/249112 external/wpt/css/css-flexbox-1/flex-minimum-width-flex-items-007.xht [ Failure ]
 
 # Not implemented yet
 crbug.com/336604 external/wpt/css/css-flexbox-1/flexbox_visibility-collapse-line-wrapping.html [ Failure ]
@@ skipping 1416 matching lines @@
 crbug.com/720511 [ Linux ] http/tests/misc/non-utf8-header-name.php [ Skip ]
 crbug.com/720511 [ Linux ] http/tests/security/contentSecurityPolicy/directive-parsing-03.html [ Failure Pass Timeout ]
 crbug.com/720511 [ Linux ] http/tests/security/contentSecurityPolicy/source-list-parsing-04.html [ Failure Pass Timeout ]
 crbug.com/720511 [ Linux ] http/tests/security/document-domain-canonicalizes.html [ Failure Pass Timeout ]
 crbug.com/720511 [ Linux ] virtual/mojo-loading/http/tests/misc/non-utf8-header-name.php [ Skip ]
 crbug.com/720511 [ Linux ] virtual/mojo-loading/http/tests/security/contentSecurityPolicy/directive-parsing-03.html [ Failure Pass Timeout ]
 crbug.com/720511 [ Linux ] virtual/mojo-loading/http/tests/security/contentSecurityPolicy/source-list-parsing-04.html [ Failure Pass Timeout ]
 crbug.com/720511 [ Linux ] virtual/mojo-loading/http/tests/security/document-domain-canonicalizes.html [ Failure Pass Timeout ]
 crbug.com/720511 [ Linux ] virtual/off-main-thread-fetch/http/tests/misc/non-utf8-header-name.php [ Skip ]
 
+# Sheriff failures 2017-05-16
+crbug.com/722849 [ Win ] inspector/animation/animation-transition-setTiming-crash.html [ Failure Pass ]
+crbug.com/722212 fast/events/pointerevents/mouse-pointer-event-properties.html [ Failure Timeout Pass ]
+
 # Tests to be run only under virtual/experimental-canvas-features/
 crbug.com/682753 fast/canvas-experimental [ Skip ]
 
 crbug.com/715405 virtual/mojo-loading/http/tests/inspector/network/waterfall-images.html [ Skip ]
 crbug.com/714166 http/tests/inspector/network/waterfall-images.html [ Skip ]
 
 crbug.com/715718 external/wpt/media-source/mediasource-activesourcebuffers.html [ Failure Pass ]
 crbug.com/715718 external/wpt/media-source/mediasource-remove.html [ Failure Pass ]
 crbug.com/715718 [ Win ] external/wpt/XMLHttpRequest/FormData-append.html [ Failure Pass ]
 crbug.com/715718 [ Win ] external/wpt/XMLHttpRequest/timeout-multiple-fetches.html [ Failure Pass ]
@@ skipping 12 matching lines @@
 crbug.com/716569 [ Android ] tables/mozilla/core/bloomberg.html [ Failure ]
 crbug.com/716569 [ Android ] tables/mozilla_expected_failures/bugs/bug1055-2.html [ Failure ]
 crbug.com/716569 [ Android ] tables/mozilla_expected_failures/bugs/bug2479-5.html [ Failure ]
 
 # Feature Policy changes same-origin allowpaymentrequest behaviour, tests need updating
 crbug.com/718155 payments/payment-request-in-iframe.html [ Failure ]
 crbug.com/718155 payments/payment-request-in-iframe-nested-not-allowed.html [ Failure ]
 
 # Layout Tests on Swarming (Windows) - https://crbug.com/717347
 crbug.com/719299 [ Win ] external/wpt/css/css-ui-3/outline-004.html [ Failure Pass Timeout ]