Add 2 more flaky tests on linux, and make sure the previous...

webkit/tools/layout_tests/test_expectations.txt

Index: webkit/tools/layout_tests/test_expectations.txt
===================================================================
--- webkit/tools/layout_tests/test_expectations.txt	(revision 26927)
+++ webkit/tools/layout_tests/test_expectations.txt	(working copy)
@@ -1818,8 +1818,10 @@
 BUG9797 WIN DEBUG : LayoutTests/editing/execCommand/paste-1.html = FAIL PASS
 BUG9797 WIN LINUX : LayoutTests/editing/pasteboard/subframe-dragndrop-1.html = FAIL PASS
 BUG9797 BUG9798 WIN : LayoutTests/http/tests/xmlhttprequest/state-after-network-error.html = CRASH TIMEOUT PASS
-BUG9798 LINUX : LayoutTests/transitions/transition-end-event-multiple-02.html = FAIL
-BUG9798 LINUX : LayoutTests/transitions/transition-end-event-multiple-04.html = FAIL
+BUG9798 LINUX : LayoutTests/transitions/transition-end-event-multiple-02.html = FAIL PASS
+BUG9798 LINUX : LayoutTests/transitions/transition-end-event-multiple-04.html = FAIL PASS
+BUG9798 LINUX : LayoutTests/transitions/interrupt-zero-duration.html = FAIL PASS
+BUG9798 LINUX : LayoutTests/svg/custom/invisible-text-after-scrolling.xhtml = FAIL PASS
 
 // Failed in WebKit merge 42287:42324
 BUG9916 WIN LINUX : LayoutTests/css2.1/t0803-c5502-mrgn-r-02-c.html = FAIL