Manually import wpt/editing and wpt/selection/

third_party/WebKit/LayoutTests/imported/wpt/editing/README

Index: third_party/WebKit/LayoutTests/imported/wpt/editing/README
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/editing/README b/third_party/WebKit/LayoutTests/imported/wpt/editing/README
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index 0000000000000000000000000000000000000000..945ce83a00b407cf9ffdca4ff4b451d706d8a812
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@@ -0,0 +1,14 @@
+Most of this directory tests conformance to the editing spec written long ago
+by Aryeh Gregor.  Nobody actually implements the spec, but the tests are still
+useful for regression testing.  The files in data/ were generated from a
+JavaScript implementation of the specification using a complex procedure that
+can't actually be replicated right now as-is.  Editing them manually is
+possible, but they're not really meant to be human-readable.  If anyone is
+interested, it would be possible for Aryeh to get the test generation procedure
+working again.  Or you could look into the repository history and figure out
+how to do it yourself, if you're brave.
+
+There is also a directory other/ that contains additional editor-related tests.
+They aren't necessarily based on any specification, but try to specify sensible
+behavior, and are meant to be helpful with regression testing for existing
+implementations and finding bugs in new implementations.