Site-per-process: re-enable autoplay tests that were broken by loading issue.

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

 # These tests currently fail when they run with --site-per-process.
 # See https://crbug.com/477150.
 
 # https://crbug.com/670105: uninvestigated test timeout caused by r435352.
 crbug.com/670105 http/tests/security/opened-document-security-origin-resets-on-navigation.html [ Timeout ]
 crbug.com/670105 virtual/mojo-loading/http/tests/security/opened-document-security-origin-resets-on-navigation.html [ Timeout ]
 
 # https://crbug.com/669083: console messages mismatch (origin-only VS full-URI)
 crbug.com/669083 http/tests/security/frameNavigation/xss-DENIED-top-navigation-without-user-gesture.html [ Failure ]
 crbug.com/669083 virtual/mojo-loading/http/tests/security/frameNavigation/xss-DENIED-top-navigation-without-user-gesture.html [ Failure ]
@@ skipping 139 matching lines @@
 crbug.com/678492 virtual/mojo-loading/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
 # https://crbug.com/594216)
 crbug.com/451577 http/tests/inspector/network/network-datareceived.html [ Timeout Pass ]
 crbug.com/451577 virtual/mojo-loading/http/tests/inspector/network/network-datareceived.html [ Timeout Pass ]
 crbug.com/24182 http/tests/perf/large-inlined-script.html [ Timeout Pass ]
 crbug.com/24182 virtual/mojo-loading/http/tests/perf/large-inlined-script.html [ Timeout Pass ]
 
-# https://crbug.com/672570: autoplay-crossorigin.html fails w/ --site-per-process
-crbug.com/672570 http/tests/media/autoplay-crossorigin.html [ Timeout ]
-crbug.com/672570 virtual/mojo-loading/http/tests/media/autoplay-crossorigin.html [ Timeout ]
-
 # https://crbug.com/680201: referrer-policy-attribute-import-no-referrer.html fails w/ --site-per-process
 crbug.com/680201 http/tests/security/referrer-policy-attribute-import-no-referrer.html [ Failure ]
 crbug.com/680201 virtual/mojo-loading/http/tests/security/referrer-policy-attribute-import-no-referrer.html [ Failure ]
 
 # https://crbug.com/680307: blob-url-in-iframe.html is missing PASS w/ --site-per-process
 crbug.com/680307 http/tests/security/mixedContent/blob-url-in-iframe.html [ Failure ]
 crbug.com/680307 virtual/mojo-loading/http/tests/security/mixedContent/blob-url-in-iframe.html [ Failure ]
 
 # TODO(lukasza, alexmos): Triage these failures.
 Bug(none) fast/frames/cached-frame-counter.html [ Timeout ]
@@ skipping 43 matching lines @@
 Bug(none) external/wpt/html/syntax/parsing/html5lib_tests8.html [ Failure ]
 Bug(none) external/wpt/html/syntax/parsing/html5lib_tests9.html [ Failure ]
 Bug(none) external/wpt/html/syntax/parsing/html5lib_tricky01.html [ Failure ]
 Bug(none) external/wpt/html/syntax/parsing/html5lib_webkit01.html [ Failure ]
 Bug(none) external/wpt/html/syntax/parsing/html5lib_webkit02.html [ Failure ]
 Bug(none) inspector/sources/debugger-frameworks/frameworks-dom-xhr-event-breakpoints.html [ Timeout ]
 Bug(none) jquery/manipulation.html [ Timeout ]
 Bug(none) storage/indexeddb/blob-valid-after-deletion.html [ Failure ]
 Bug(none) storage/indexeddb/blob-valid-before-commit.html [ Failure ]
 Bug(none) storage/indexeddb/empty-crash.html [ Timeout ]