Sheriff: Mark failing WebDriver tests as flaky

These tests have been flakily failing due to a crash in Chrome.

(cherry picked from commit cd1cb46)

Bug: 1325690
Change-Id: I2db12f1286972a4dc5235fc4d581c0a91a418a24
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3650106
Reviewed-by: Maggie Cai <mxcai@chromium.org>
Commit-Queue: Maggie Cai <mxcai@chromium.org>
Auto-Submit: Tim Sergeant <tsergeant@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#1003618}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3650972
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Joe Downing <joedow@chromium.org>
Cr-Commit-Position: refs/branch-heads/5060@{#27}
Cr-Branched-From: b83393d-refs/heads/main@{#1002911}

third_party/blink/web_tests/WebDriverExpectations

@@ -519,3 +519,15 @@ crbug.com/1123907 [ Linux ] external/wpt/webdriver/tests/fullscreen_window/stres
 crbug.com/1123907 [ Linux ] external/wpt/webdriver/tests/fullscreen_window/stress.py>>test_stress [ Failure Pass ]
 crbug.com/1128104 [ Linux ] external/wpt/webdriver/tests/release_actions/sequence.py>>test_no_release_mouse_sequence_keeps_dblclick_state [ Failure ]
 crbug.com/626703 [ Linux ] external/wpt/webdriver/tests/perform_actions/pointer_origin.py>>test_element_larger_than_viewport [ Failure ]
+crbug.com/1325690 [ Linux ] external/wpt/webdriver/tests/take_element_screenshot/user_prompts.py>>test_accept[capabilities0-alert-None] [ Failure Pass ]
+crbug.com/1325690 [ Linux ] external/wpt/webdriver/tests/take_element_screenshot/user_prompts.py>>test_accept[capabilities0-confirm-True] [ Failure Pass ]
+crbug.com/1325690 [ Linux ] external/wpt/webdriver/tests/take_element_screenshot/user_prompts.py>>test_accept[capabilities0-prompt-] [ Failure Pass ]
+crbug.com/1325690 [ Linux ] external/wpt/webdriver/tests/take_element_screenshot/user_prompts.py>>test_dismiss[capabilities0-alert-None] [ Failure Pass ]
+crbug.com/1325690 [ Linux ] external/wpt/webdriver/tests/take_element_screenshot/user_prompts.py>>test_dismiss[capabilities0-confirm-False] [ Failure Pass ]
+crbug.com/1325690 [ Linux ] external/wpt/webdriver/tests/take_element_screenshot/user_prompts.py>>test_dismiss[capabilities0-prompt-None] [ Failure Pass ]
+crbug.com/1325690 [ Linux ] external/wpt/webdriver/tests/take_screenshot/user_prompts.py>>test_accept[capabilities0-alert-None] [ Failure Pass ]
+crbug.com/1325690 [ Linux ] external/wpt/webdriver/tests/take_screenshot/user_prompts.py>>test_accept[capabilities0-confirm-True] [ Failure Pass ]
+crbug.com/1325690 [ Linux ] external/wpt/webdriver/tests/take_screenshot/user_prompts.py>>test_accept[capabilities0-prompt-] [ Failure Pass ]
+crbug.com/1325690 [ Linux ] external/wpt/webdriver/tests/take_screenshot/user_prompts.py>>test_dismiss[capabilities0-alert-None] [ Failure Pass ]
+crbug.com/1325690 [ Linux ] external/wpt/webdriver/tests/take_screenshot/user_prompts.py>>test_dismiss[capabilities0-confirm-False] [ Failure Pass ]
+crbug.com/1325690 [ Linux ] external/wpt/webdriver/tests/take_screenshot/user_prompts.py>>test_dismiss[capabilities0-prompt-None] [ Failure Pass ]