Add Android Support test runner library to chromium

third_party/android_support_test_runner/BUILD.gn

Index: third_party/android_support_test_runner/BUILD.gn
diff --git a/third_party/android_support_test_runner/BUILD.gn b/third_party/android_support_test_runner/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..e4a7a26ec291bd14ff8690ad085a022f945ff536
--- /dev/null
+++ b/third_party/android_support_test_runner/BUILD.gn
@@ -0,0 +1,12 @@
+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build/config/android/rules.gni")
+
+android_java_prebuilt("runner") {
+  jar_path = "lib/runner-0.3-release-no-dep.jar"
+  deps = [
+    "//third_party/guava:guava_java",
+  ]
+}