Make layout test harness extensible with custom layout tests directory

third_party/WebKit/Source/devtools/layout_tests/TestExpectations

Index: third_party/WebKit/Source/devtools/layout_tests/TestExpectations
diff --git a/third_party/WebKit/Source/devtools/layout_tests/TestExpectations b/third_party/WebKit/Source/devtools/layout_tests/TestExpectations
new file mode 100644
index 0000000000000000000000000000000000000000..c40552498b25ea48ab1aea23c1d021fbb8213040
--- /dev/null
+++ b/third_party/WebKit/Source/devtools/layout_tests/TestExpectations
@@ -0,0 +1,34 @@
+crbug.com/420008 inspector/tracing/worker-js-frames.html [ Pass Timeout Failure ]
+crbug.com/420008 virtual/threaded/inspector/tracing/worker-js-frames.html [ Pass Timeout Failure ]
+crbug.com/521853 [ Win ] http/tests/inspector/search/sources-search-scope.html [ Failure Pass ]
+crbug.com/498539 [ Win ] inspector/tracing/decode-resize.html [ Failure Timeout ]
+crbug.com/498539 inspector/console/console-log-syntax-error.html [ Pass Timeout ]
+crbug.com/498539 inspector/tracing/timeline-misc/timeline-bound-function.html [ Pass Failure ]
+crbug.com/498539 virtual/threaded/inspector/tracing/timeline-misc/timeline-bound-function.html [ Pass Failure ]
+crbug.com/498539 [ Mac ] inspector/sources/debugger/live-edit-no-reveal.html [ Crash Pass Timeout ]
+crbug.com/498539 [ Win7 ] inspector/sources/debugger-pause/debugger-eval-on-call-frame-inside-iframe.html [ Failure Pass ]
+crbug.com/498539 [ Mac10.9 ] inspector/console/console-uncaught-exception.html [ Failure Pass ]
+crbug.com/498539 [ Win7 ] inspector/console/console-dir-es6.html [ Failure Pass ]
+crbug.com/498539 [ Win7 ] inspector/elements/styles-4/styles-update-from-js.html [ Crash Pass ]
+crbug.com/659456 http/tests/inspector/persistence/automapping-sourcemap.html [ Pass Failure ]
+crbug.com/655963 inspector/console/console-dir.html [ NeedsManualRebaseline ]
+crbug.com/657831 http/tests/inspector-enabled/console-stack-overflow-source-url.html [ NeedsManualRebaseline ]
+crbug.com/564403 [ Win Debug ] http/tests/inspector/service-workers/service-worker-manager.html [ Failure Pass Timeout ]
+crbug.com/504706 [ Linux ] inspector/profiler/heap-snapshot-containment-expansion-preserved-when-sorting.html [ Pass ]
+crbug.com/504706 [ Linux ] inspector/profiler/heap-snapshot-containment-sorting.html [ Pass ]
+crbug.com/480769 http/tests/inspector/service-workers/service-workers-redundant.html [ Pass Failure ]
+crbug.com/599670 [ Win Linux ] http/tests/inspector/resource-parameters-ipv6.html [ Failure Pass ]
+crbug.com/491764 http/tests/inspector/service-workers/user-agent-override.html [ Pass Timeout ]
+crbug.com/567419 inspector/elements/styles-2/metrics-box-sizing.html [ Skip ]
+crbug.com/596752 virtual/threaded/inspector/tracing/decode-resize.html [ Pass Failure ]
+crbug.com/548765 http/tests/inspector/console-fetch-logging.html [ Failure Pass ]
+crbug.com/575766 http/tests/inspector/resource-tree/resource-tree-frame-add.html [ Timeout Pass ]
+crbug.com/581468 http/tests/inspector/resource-tree/resource-tree-non-unique-url.html [ Pass Failure ]
+crbug.com/572723 [ Linux Mac10.9 ] inspector/sources/debugger/debugger-disable-enable.html [ Pass Failure Timeout ]
+crbug.com/572723 inspector/sources/debugger/debugger-uncaught-promise-on-pause.html [ Timeout Pass ]
+crbug.com/610464 [ Linux Win7 Debug ] inspector/components/throttler.html [ Failure Pass ]
+crbug.com/399507 [ Mac Linux Win10 ] virtual/threaded/inspector/tracing/timeline-paint/layer-tree.html [ Skip ]
+crbug.com/635909 [ Debug ] inspector/sources/debugger-frameworks/frameworks-dom-xhr-event-breakpoints.html [ Pass Timeout ]
+crbug.com/638618 inspector/editor/text-editor-search-switch-editor.html [ Skip ]
+crbug.com/645640 inspector/extensions/extensions-eval.html [ NeedsManualRebaseline ]
+crbug.com/652187 [ Win7 Debug ] http/tests/inspector/network/network-disable-cache-preloads.php [ Failure ]