Implement the status tray/icon API for ChromeOS.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index 701372d6640f3957ec4a6beca05eed279923e5cf..6ebf8186bcd43b4fa14472c1367e6e8339fd501f 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -2658,6 +2658,7 @@
         'browser/ui/views/dom_view_browsertest.cc',
         'browser/ui/views/html_dialog_view_browsertest.cc',
         'browser/ui/views/select_file_dialog_extension_browsertest.cc',
+        'browser/ui/views/status_icons/status_tray_chromeos_browsertest.cc',
         'browser/ui/webui/chrome_url_data_manager_browsertest.cc',
         'browser/ui/webui/ntp/most_visited_browsertest.cc',
         'browser/ui/webui/test_chrome_web_ui_factory_browsertest.cc',
@@ -2783,6 +2784,7 @@
             'browser/extensions/extension_input_method_apitest.cc',
             'browser/oom_priority_manager_browsertest.cc',
             'browser/policy/enterprise_metrics_enrollment_browsertest.cc',
+            'browser/ui/views/status_icons/status_tray_chromeos_browsertest.cc',
           ],
         }, { #else: OS == "chromeos"
           'sources!': [
@@ -2799,6 +2801,7 @@
                 ['exclude', '^browser/chromeos/login/screen_locker_browsertest.cc'],
                 ['exclude', '^browser/chromeos/login/screen_locker_tester.cc'],
                 ['exclude', '^browser/chromeos/notifications/'],
+                ['exclude', '^browser/ui/views/status_icons/status_tray_chromeos_browsertest.cc'],
               ],
             }],
           ],