Add Unit Tests to SnackbarCollection

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_overrides/v8.gni")
 import("//chrome/android/chrome_public_apk_tmpl.gni")
 import("//chrome/common/features.gni")
 import("//chrome/version.gni")
@@ skipping 260 matching lines @@
     "junit/src/org/chromium/chrome/browser/media/remote/TransportControlTest.java",
     "junit/src/org/chromium/chrome/browser/media/router/ChromeMediaRouterRouteTest.java",
     "junit/src/org/chromium/chrome/browser/media/router/ChromeMediaRouterSinkObservationTest.java",
     "junit/src/org/chromium/chrome/browser/media/router/ChromeMediaRouterTestBase.java",
     "junit/src/org/chromium/chrome/browser/media/router/cast/DiscoveryCallbackTest.java",
     "junit/src/org/chromium/chrome/browser/media/router/cast/TestUtils.java",
     "junit/src/org/chromium/chrome/browser/omaha/ResponseParserTest.java",
     "junit/src/org/chromium/chrome/browser/omaha/VersionNumberTest.java",
     "junit/src/org/chromium/chrome/browser/util/NonThreadSafeTest.java",
     "junit/src/org/chromium/chrome/browser/notifications/NotificationUIManagerUnitTest.java",
+    "junit/src/org/chromium/chrome/browser/snackbar/SnackbarCollectionUnitTest.java",
     "junit/src/org/chromium/chrome/browser/webapps/WebappDataStorageTest.java",
     "junit/src/org/chromium/chrome/browser/webapps/WebappRegistryTest.java",
   ]
   deps = [
     ":chrome_java",
     "//base:base_java",
     "//base:base_java_test_support",
     "//base:base_junit_test_support",
     "//components/bookmarks/common/android:bookmarks_java",
     "//components/invalidation/impl:java",
@@ skipping 289 matching lines @@
   apk_name = "ChromeSyncShellTest"
   apk_under_test = ":chrome_sync_shell_apk"
   android_manifest = chrome_sync_shell_test_apk_manifest
   deps = [
     ":chrome_sync_shell_test_apk_java",
     ":chrome_sync_shell_test_apk_manifest",
   ]
   isolate_file = "../chrome_sync_shell_test_apk.isolate"
   proguard_enabled = !is_debug
 }