[Android] Add gyp support for multidex.

chrome/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")
 import("//build/module_args/v8.gni")
 import("//chrome/version.gni")
 import("//testing/test.gni")
 import("//third_party/icu/config.gni")
@@ skipping 494 matching lines @@
     "junit/src/org/chromium/chrome/browser/omaha/ResponseParserTest.java",
     "junit/src/org/chromium/chrome/browser/media/remote/AbstractMediaRouteControllerTest.java",
     "junit/src/org/chromium/chrome/browser/media/remote/MediaUrlResolverTest.java",
     "junit/src/org/chromium/chrome/browser/media/remote/RemoteVideoInfoTest.java",
     "junit/src/org/chromium/chrome/browser/media/remote/TransportControlTest.java",
   ]
   deps = [
     ":chrome_java",
     "//base:base_java",
     "//base:base_java_test_support",
+    "//base:base_junit_test_support",
     "//sync:sync_java_test_support",
     "//sync/android:sync_java",
     "//third_party/junit:hamcrest",
     "//third_party/android_tools:android_support_v7_mediarouter_java",
   ]
 }
 
 # GYP: //chrome/chrome_tests.gypi:chrome_sync_shell_test_apk
 if (false) {
   # TODO(GYP): We need sync/sync_tests.gypi:test_support_sync_proto_java to be ported.
@@ skipping 228 matching lines @@
   # TODO(GYP,cjhopman): Does this need version code/name?
   apk_name = "ChromePublicTest"
   apk_under_test = ":chrome_public_apk"
   android_manifest = chrome_public_test_apk_manifest
   deps = [
     ":chrome_public_test_apk_manifest",
     "//chrome/android:chrome_shared_test_java",
   ]
   isolate_file = "../chrome_public_test_apk.isolate"
 }