[Android] Add an out-of-app instrumentation driver APK.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index 9d65d26126686f91adf6b7f0ef37dd9f67e8fb9b..3b1be012fdb5fb9786c15b6dbfe5a1a9e037e054 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -2928,6 +2928,7 @@
             '../components/components.gyp:precache_javatests',
             '../content/content_shell_and_tests.gyp:content_java_test_support',
             '../sync/sync.gyp:sync_javatests',
+            '../testing/android/on_device_instrumentation.gyp:broker_java',

[Yaron, 2015/04/18 00:22:58]

This might be over-thinking it but you could have java_apk add this to deps for
is_test_apk == 1

[jbudorick, 2015/04/20 19:21:38]

I've left this as-is for now. I'm not sure it makes sense to include this in
APKs that don't use BaseInstrumentationTestRunner or a class that derives from
it.

             '../ui/android/ui_android.gyp:ui_javatests',
           ],
           'variables': {