Revert of Address some TODO(GYP_GONE)s

testing/test.gni

Index: testing/test.gni
diff --git a/testing/test.gni b/testing/test.gni
index 96febe0f55e8f7a65668e09ad310e2ebea52034b..407e8f45a050ee202c9c3e04713eeaede949ddcc 100644
--- a/testing/test.gni
+++ b/testing/test.gni
@@ -283,6 +283,24 @@
         "//build/win:default_exe_manifest",
       ]
     }
+
+    # TODO(GYP_GONE): Delete this after we've converted everything to GN.
+    # The _run targets exist only for compatibility with GYP.
+    group("${target_name}_run") {
+      testonly = true
+      deps = [
+        ":${invoker.target_name}",
+      ]
+    }
+
+    if (defined(invoker.output_name) && target_name != invoker.output_name) {
+      group("${invoker.output_name}_run") {
+        testonly = true
+        deps = [
+          ":${invoker.target_name}",
+        ]
+      }
+    }
   }
 }