Allow ambiguous Expect and ExpectException imports.

runtime/vm/parser.cc

Index: runtime/vm/parser.cc
diff --git a/runtime/vm/parser.cc b/runtime/vm/parser.cc
index 34dee42f0d9bc5d7144d765429f6a5a71f5cb2df..48c31c4f07690c1fb7dce09d248856e8571c000e 100644
--- a/runtime/vm/parser.cc
+++ b/runtime/vm/parser.cc
@@ -8223,7 +8223,10 @@ RawObject* Parser::ResolveNameInCurrentLibraryScope(intptr_t ident_pos,
       imported_obj = LookupNameInImport(import, name);
       if (!imported_obj.IsNull()) {
         const Library& lib = Library::Handle(import.library());
-        if (!first_lib_url.IsNull()) {
+        // TODO(8474): Remove the "Expect" special casing.
+        if (!first_lib_url.IsNull()
+            && (strcmp(name.ToCString(), "Expect") != 0)
+            && (strcmp(name.ToCString(), "ExpectException") != 0)) {
           // Found duplicate definition.
           Error& ambiguous_ref_error = Error::Handle();
           if (first_lib_url.raw() == lib.url()) {