Checkpoint work to import new tests from the w3c repos.

LayoutTests/W3CImportExpectations

Index: LayoutTests/W3CImportExpectations
diff --git a/LayoutTests/W3CImportExpectations b/LayoutTests/W3CImportExpectations
index 60e7f9496d65c68d8091f3d4e8a2fba7c6d5ead2..5712a6a6e471a36446be63969af9ff13b9bad856 100644
--- a/LayoutTests/W3CImportExpectations
+++ b/LayoutTests/W3CImportExpectations
@@ -3,7 +3,17 @@
 # This file acts as a blacklist; directories and files not listed here will automatically
 # be found and imported.
 
-w3c/csswg-test [ Skip ]
+w3c/csswg-test/approved [ Skip ]
+w3c/csswg-test/build-test [ Skip ]
+w3c/csswg-test/contributors [ Skip ]
+w3c/csswg-test/cvs-import [ Skip ]
+w3c/csswg-test/test-plans [ Skip ]
+w3c/csswg-test/tools-plans [ Skip ]
+w3c/csswg-test/tools [ Skip ]
+w3c/csswg-test/.gitmodules [ Skip ]
+w3c/csswg-test/.hgsubstate [ Skip ]
+w3c/csswg-test/.htaccess [ Skip ]
+
 w3c/web-platform-tests/2dcontext [ Skip ]
 w3c/web-platform-tests/DOMEvents [ Skip ]
 w3c/web-platform-tests/FileAPI [ Skip ]
@@ -55,3 +65,21 @@ w3c/web-platform-tests/webmessaging [ Skip ]
 w3c/web-platform-tests/websockets [ Skip ]
 w3c/web-platform-tests/webstorage [ Skip ]
 w3c/web-platform-tests/workers [ Skip ]
+
+# Exceptions for individual files that fail due to bugs in the upstream tests
+# that we shouldn't bother importing until they are fixed.
+
+# these contain an extraneous debug log div ..
+w3c/web-platform-tests/html-imports/link-import-null.html [ Skip ]
+w3c/web-platform-tests/html-imports/link-import.html [ Skip ]
+w3c/web-platform-tests/html-imports/loading-import.html [ Skip ]
+
+# uses link="reference" rather than link="match"
+w3c/web-platform-tests/shadow-dom/shadow-trees/hosting-multiple-shadow-trees-002.html [ Skip ]
+w3c/web-platform-tests/shadow-dom/shadow-trees/hosting-multiple-shadow-trees-003.html [ Skip ]
+w3c/web-platform-tests/shadow-dom/shadow-trees/hosting-multiple-shadow-trees-004.html [ Skip ]
+w3c/web-platform-tests/shadow-dom/shadow-trees/hosting-multiple-shadow-trees-005.html [ Skip ]
+w3c/web-platform-tests/shadow-dom/shadow-trees/hosting-multiple-shadow-trees-006.html [ Skip ]
+w3c/web-platform-tests/shadow-dom/shadow-trees/text-decoration-001.html [ Skip ]
+w3c/web-platform-tests/shadow-dom/styles/not-apply-in-shadow-root-001.html [ Skip ]
+