Use the new test runner on the bots.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1374033002 .
diff --git a/.test_config b/.test_config
new file mode 100644
index 0000000..531426a
--- /dev/null
+++ b/.test_config
@@ -0,0 +1,5 @@
+{
+  "test_package": {
+    "platforms": ["vm"]
+  }
+}
\ No newline at end of file