Linux native notifications: Add initial unit test

chrome/test/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/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 3633 matching lines @@
       "//chrome/test/data/webui:unit_tests_js",
       "//components/bubble:test_support",
     ]
     data += [
       "$root_out_dir/test_data/chrome/browser/resources/print_preview/",
       "$root_out_dir/test_data/chrome/renderer/resources/extensions/",
       "$root_out_dir/test_data/ui/webui/",
     ]
   }
 
+  if (is_desktop_linux && enable_native_notifications) {

[Lei Zhang, 2017/04/29 01:35:05]

Curiuos why the mac version isn't gated on similar logic.

[Tom (Use chromium acct), 2017/05/01 18:25:29]

The mac version doesn't need to be conditioned on enable_native_notifications
because it doesn't have the additional use_dbus dependency the Linux version
has.

Also, ninja only includes files with _mac in the filename in the mac version, so
it doesn't even need is_mac.

+    sources += [ "../browser/notifications/notification_platform_bridge_linux_unittest.cc" ]
+  }
+
   if (is_linux || is_win) {
     sources += [ "../browser/webshare/share_service_impl_unittest.cc" ]
   }
 
   if (is_chromeos) {
     sources -= [ "../browser/signin/chrome_signin_status_metrics_provider_delegate_unittest.cc" ]
   }
   if (enable_background) {
     sources += [
       "../browser/background/background_application_list_model_unittest.cc",
@@ skipping 1353 matching lines @@
 }
 
 if (is_win) {
   loadable_module("conflicts_dll") {
     testonly = true
     sources = [
       "conflicts/conflicts_dll.cc",
     ]
   }
 }