Add GN data/data_deps logic for some test binaries.

third_party/cacheinvalidation/BUILD.gn

Index: third_party/cacheinvalidation/BUILD.gn
diff --git a/third_party/cacheinvalidation/BUILD.gn b/third_party/cacheinvalidation/BUILD.gn
index 17e4d1c4a1af470be60a1041506c9b31d2f8ef95..5056841e90e13b063e6e86b62407c46494e33115 100644
--- a/third_party/cacheinvalidation/BUILD.gn
+++ b/third_party/cacheinvalidation/BUILD.gn
@@ -90,6 +90,15 @@ static_library("cacheinvalidation") {
   ]
 }
 
+# TODO(GYP): Delete this after we've converted everything to GN.
+# The _run targets exist only for compatibility w/ GYP.
+group("cacheinvalidation_unittests_run") {
+  testonly = true
+  deps = [
+    ":cacheinvalidation_unittests",
+  ]
+}
+
 test("cacheinvalidation_unittests") {
   sources = [
     "src/google/cacheinvalidation/impl/invalidation-client-impl_test.cc",