Mark two tests flaky.

LayoutTests/TestExpectations

Index: LayoutTests/TestExpectations
diff --git a/LayoutTests/TestExpectations b/LayoutTests/TestExpectations
index faf0a0917cf3f24b03852e1845c17f2845fd560a..c3793bf5bc56b6090219664784d82fb80243103f 100644
--- a/LayoutTests/TestExpectations
+++ b/LayoutTests/TestExpectations
@@ -963,7 +963,7 @@ crbug.com/356996 [ Debug ] html5lib/generated/run-tests1-data.html [ Pass Timeou
 crbug.com/356996 [ Mac Release ] html5lib/generated/run-tests1-data.html [ Pass Timeout ]
 crbug.com/356997 http/tests/security/isolatedWorld/events.html [ Failure Pass ]
 crbug.com/357002 [ Linux ] http/tests/misc/cache-hit-resource-timing-buffer-full-crash.html [ Failure Pass ]
-crbug.com/357004 inspector/sources/debugger/script-formatter-breakpoints-2.html [ Failure ]
+crbug.com/357004 inspector/sources/debugger/script-formatter-breakpoints-2.html [ Pass Timeout ]
 crbug.com/357068 css3/images/cross-fade-invalidation.html [ ImageOnlyFailure Pass ]
 crbug.com/357069 [ Debug ] fast/media/lifetime.html [ Crash Pass Timeout ]
 crbug.com/357071 gamepad/gamepad-polling-access.html [ Crash Pass ]
@@ -978,6 +978,7 @@ crbug.com/357085 [ Win Debug ] virtual/threaded/animations/unanimated-style.html
 crbug.com/357088 [ Debug ] web-animations-api/timeline-updates-players.html [ Failure Pass ]
 crbug.com/357088 [ Linux Release ] web-animations-api/timeline-updates-players.html [ Failure Pass ]
 crbug.com/357097 editing/context-menu-leak-document.html [ Failure ]
+crbug.com/357427 http/tests/workers/terminate-during-sync-operation.html [ Crash Pass Slow Timeout ]
 
 crbug.com/353087 w3c/web-platform-tests/shadow-dom/elements-and-dom-objects/shadowroot-object/shadowroot-attributes/test-005.html [ Failure ]
 crbug.com/353087 w3c/web-platform-tests/shadow-dom/elements-and-dom-objects/the-content-html-element/test-004.html [ Failure ]