Fix crash when programatically closing media gallery dialog

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index 2e3c289bcbabfda148872d91a7cb3073b75d3456..a4d8c2bec31b66104da5d29cc88b92f38082a5c5 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -978,6 +978,8 @@
         'browser/loadtimes_extension_bindings_browsertest.cc',
         'browser/locale_tests_browsertest.cc',
         'browser/logging_chrome_browsertest.cc',
+        'browser/media_gallery/media_galleries_dialog_controller_mock.cc',
+        'browser/media_gallery/media_galleries_dialog_controller_mock.h',
         'browser/metrics/metrics_service_browsertest.cc',
         'browser/net/cookie_policy_browsertest.cc',
         'browser/net/ftp_browsertest.cc',
@@ -1057,6 +1059,7 @@
         'browser/ui/cocoa/extensions/extension_install_dialog_controller_browsertest.mm',
         'browser/ui/cocoa/extensions/extension_install_prompt_test_utils.h',
         'browser/ui/cocoa/extensions/extension_install_prompt_test_utils.mm',
+        'browser/ui/cocoa/extensions/media_galleries_dialog_cocoa_browsertest.mm',
         'browser/ui/cocoa/intents/web_intent_inline_service_view_controller_browsertest.mm',
         'browser/ui/cocoa/intents/web_intent_picker_view_controller_browsertest.mm',
         'browser/ui/find_bar/find_bar_host_browsertest.cc',