[Android] Add gyp support for multidex.

net/android/BUILD.gn

 # Copyright 2014 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/config.gni")
 import("//build/config/android/rules.gni")
 
 android_library("net_java") {
   DEPRECATED_java_in_dir = "java/src"
   deps = [
@@ skipping 69 matching lines @@
   ]
 }
 
 junit_binary("net_junit_tests") {
   java_files =
       [ "junit/src/org/chromium/net/HttpNegotiateAuthenticatorTest.java" ]
   deps = [
     ":net_java",
     "//base:base_java",
     "//base:base_java_test_support",
+    "//base:base_junit_test_support",
     "//third_party/junit:hamcrest",
   ]
 }
 
 # TODO(GYP)
 if (false) {
   unittest_apk("net_unittests_apk") {
     deps = [
       ":net_java",
       ":net_javatests",
       "//net:net_unittests",
     ]
     unittests_dep = "//net:net_unittests"
   }
 }