Update site-per-process expectations for off-main-thread-fetch virtual test suite.

third_party/WebKit/LayoutTests/FlagExpectations/site-per-process

Index: third_party/WebKit/LayoutTests/FlagExpectations/site-per-process
diff --git a/third_party/WebKit/LayoutTests/FlagExpectations/site-per-process b/third_party/WebKit/LayoutTests/FlagExpectations/site-per-process
index a3f8b6373b497ab74f2874ca7f0f389e4e81bdd1..768fef283690404fb3a59846c393ab62c3e683df 100644
--- a/third_party/WebKit/LayoutTests/FlagExpectations/site-per-process
+++ b/third_party/WebKit/LayoutTests/FlagExpectations/site-per-process
@@ -96,6 +96,7 @@ crbug.com/606594 virtual/mojo-loading/http/tests/local/serviceworker/fetch-reque
 # https://crbug.com/607991 - MockWebClipboardImpl not replicated across OOPIFs.
 crbug.com/607991 http/tests/misc/copy-resolves-urls.html [ Failure ]
 crbug.com/607991 virtual/mojo-loading/http/tests/misc/copy-resolves-urls.html [ Failure ]
+crbug.com/607991 virtual/off-main-thread-fetch/http/tests/misc/copy-resolves-urls.html [ Failure ]
 
 # https://crbug.com/608780 - window.performance doesn't work with OOPIFs
 crbug.com/608780 http/tests/w3c/webperf/submission/Intel/resource-timing/test_resource_timing_cross_origin_redirect.html [ Failure ]
@@ -174,6 +175,7 @@ crbug.com/678491 virtual/mojo-loading/http/tests/misc/webtiming-no-origin.html [
 # These tests sometimes fail on usual bots but crash w/ --site-per-process.
 crbug.com/678492 http/tests/misc/webtiming-ssl.php [ Crash ]
 crbug.com/678492 virtual/mojo-loading/http/tests/misc/webtiming-ssl.php [ Crash ]
+crbug.com/678492 virtual/off-main-thread-fetch/http/tests/misc/webtiming-ssl.php [ Crash ]
 
 # Slow tests. These are listed in SlowTests listed here also because
 # expectations are unfortunately not inherited automatically (e.g. see