Adding specific bugs for layout test failures with --site-per-process flag.

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 dab348cd1bf1b52149ea546e6f30f4661077a755..44197891f9269b78abccaa2f90c82cbe38fe64c9 100644
--- a/third_party/WebKit/LayoutTests/FlagExpectations/site-per-process
+++ b/third_party/WebKit/LayoutTests/FlagExpectations/site-per-process
@@ -82,13 +82,21 @@ http/tests/w3c/webperf/submission/Intel/resource-timing/test_resource_timing_tim
 # https://crbug.com/585501 - csp directives are not replicated to OOPIFs
 http/tests/security/contentSecurityPolicy/frame-src-child-frame-navigates-to-blocked-origin.html [ Failure ]
 
+# https://crbug.com/615156 - Need to make IntersectionObserver work with OOPIFs.
+http/tests/intersection-observer/iframe-cross-origin.html [ Timeout ]
+
+# https://crbug.com/616608 - Test-generated mouse click doesn't work with --site-per-process.
+http/tests/security/referrer-policy-redirect-link.html [ Timeout ]
+
+# https://crbug.com/616626 - allow_universal_access_from_file_urls doesn't work with --site-per-process.
+http/tests/local/drag-over-remote-content.html [ Timeout ]
+
 # TODO(alexmos,lukasza): Triage these failures and assign more specific bugs.
 # Uninvestigated failures under http/tests/security:
 http/tests/security/cross-origin-shared-worker-allowed.html [ Failure Timeout ]
 http/tests/security/cross-origin-worker-indexeddb-allowed.html [ Failure Timeout ]
 http/tests/security/frameNavigation/not-opener.html [ Timeout ]
 http/tests/security/frameNavigation/xss-DENIED-targeted-link-navigation.html [ Timeout ]
-http/tests/security/referrer-policy-redirect-link.html [ Timeout ]
 # Uninvestigated failures under http/tests (but outside of http/tests/security):
 http/tests/history/cross-origin-redirect-on-back.html [ Timeout ]
 http/tests/inspector-protocol/request-mixed-content-status-blockable.html [ Timeout ]
@@ -103,7 +111,5 @@ http/tests/inspector/extensions-network-redirect.html [ Timeout ]
 http/tests/inspector/extensions-useragent.html [ Timeout ]
 http/tests/inspector/indexeddb/resources-panel.html [ Timeout ]
 http/tests/inspector/inspect-iframe-from-different-domain.html [ Timeout ]
-http/tests/intersection-observer/iframe-cross-origin.html [ Timeout ]
-http/tests/local/drag-over-remote-content.html [ Crash Timeout ]
 http/tests/navigation/cross-origin-fragment-navigation-is-async.html [ Failure ]
 http/tests/serviceworker/http-to-https-redirect-and-register.html [ Timeout ]