Attempt to fix all flakyness in the Linux layout tests....

webkit/tools/layout_tests/test_expectations.txt

 // This file consists of lines with specifications of what
 // to expect from layout test cases. The test cases can be directories
 // in which case the expectations apply to all test cases in that
 // directory and any subdirectory. The format of the file is along the
 // lines of:
 //
 // LayoutTests/fast/js/fixme.js = FAIL
 // LayoutTests/fast/js/flaky.js = FAIL PASS
 // LayoutTests/fast/js/crash.js = CRASH TIMEOUT FAIL PASS
 //
@@ skipping 2257 matching lines @@
 BUG9962 MAC : LayoutTests/http/tests/security/XFrameOptions/x-frame-options-deny.html = FAIL
 BUG9962 MAC : LayoutTests/http/tests/security/XFrameOptions/x-frame-options-parent-same-origin-allow.html = TIMEOUT FAIL
 BUG9962 MAC : LayoutTests/http/tests/security/XFrameOptions/x-frame-options-parent-same-origin-deny.html = FAIL
 
 // Regressions from WebKit merge 43264:42403, possibly due to r42375.
 BUG9992 WIN LINUX : LayoutTests/fast/text/shadow-no-blur.html = FAIL
 
 // Regressions from WebKit merge 43264:42403, unknown cause(s)
 BUG10055 LINUX DEBUG : LayoutTests/editing/execCommand/paste-1.html = FAIL PASS
 BUG10055 MAC : LayoutTests/fast/events/updateLayoutForHitTest.html = FAIL
-BUG10055 LINUX : LayoutTests/svg/text/text-tselect-02-f.svg = FAIL
 
 // This test was changed upstream in http://trac.webkit.org/changeset/42447
 // to include window.showModalDialog, which we give as undefined.
 BUG10530 : LayoutTests/fast/dom/Window/window-function-frame-getter-precedence.html = FAIL
 
 // Need rebaselining for Linux, from WebKit merge 42580:42609
 // The content editable div is wider on linux than on windows.
 BUG11122 LINUX : LayoutTests/fast/forms/caret-rtl.html = FAIL
 
 // New tests from WebKit Merge 42609:42671
@@ skipping 449 matching lines @@
 // WebKit 44438:44544
 BUG13721 LINUX : LayoutTests/fast/dynamic/positioned-movement-with-positioned-children.html = FAIL
 
 // New test added in WebKit 44550:
 BUG13767 : LayoutTests/fast/js/JSON-stringify.html = FAIL TIMEOUT
 
 // WebKit 44571:44597
 // Needs pixel results generated upstream, may need rebaselining afterwards
 BUG13809 SKIP : LayoutTests/fast/canvas/canvas-empty-image-pattern.html = FAIL
 
-// DCHECK failure about current message loop.
-BUG14014 DEBUG : LayoutTests/fast/events/tabindex-focus-chain.html = FAIL
-
 // WebKit 44646:44668
 BUG14061 : LayoutTests/svg/filters/subRegion-one-effect.svg = FAIL
 BUG14061 : LayoutTests/svg/filters/subRegion-two-effects.svg = FAIL
 
-// New version of V8.  Seems unrelated, see test.
-BUG14207 LINUX DEBUG : LayoutTests/tables/mozilla/bugs/bug28341.html = FAIL
 
 // Newly added test http://trac.webkit.org/changeset/44816
 BUG14673 : LayoutTests/http/tests/xmlhttprequest/cross-origin-no-authorization.html = FAIL CRASH
 
 // WebKit 44805:44837
 BUG14679 LINUX : LayoutTests/fast/backgrounds/animated-gif-as-background.html = FAIL
 BUG14686 MAC : LayoutTests/fast/replaced/width100percent-searchfield.html = FAIL
+
+// Need investigation: test shell crashers.
+BUG14752 LINUX DEBUG: LayoutTests/http/tests/cache/subresource-expiration.html = CRASH PASS
+BUG14751 LINUX DEBUG: LayoutTests/css2.1/atrule_longest_match.html = CRASH PASS