Use the test runner on the bots.

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//1221303016.
diff --git a/.test_config b/.test_config
new file mode 100644
index 0000000..412fc5c
--- /dev/null
+++ b/.test_config
@@ -0,0 +1,3 @@
+{
+  "test_package": true
+}
\ No newline at end of file