Refactor BrowserActivationWaiter as test support and move PopupBlockerBrowserTest to interactive_ui…

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index 0db7c5355dd922fb1c09466d1136b6c1bf0a3718..68fedb09cc2c73cde92c60b588cd0da817a40724 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -390,6 +390,7 @@ if (!is_android) {
       "../browser/renderer_context_menu/render_view_context_menu_browsertest_util.h",
       "../browser/site_per_process_interactive_browsertest.cc",
       "../browser/ui/autofill/autofill_popup_controller_interactive_uitest.cc",
+      "../browser/ui/blocked_content/popup_blocker_browsertest.cc",
       "../browser/ui/browser_focus_uitest.cc",
       "../browser/ui/cocoa/apps/app_shim_menu_controller_mac_interactive_uitest.mm",
       "../browser/ui/cocoa/apps/quit_with_apps_controller_mac_interactive_uitest.mm",
@@ -1719,7 +1720,6 @@ test("browser_tests") {
       "../browser/ui/autofill/card_unmask_prompt_view_tester.h",
       "../browser/ui/autofill/password_generation_popup_view_browsertest.cc",
       "../browser/ui/autofill/password_generation_popup_view_tester.h",
-      "../browser/ui/blocked_content/popup_blocker_browsertest.cc",
       "../browser/ui/bookmarks/bookmark_browsertest.cc",
       "../browser/ui/browser_browsertest.cc",
       "../browser/ui/browser_command_controller_browsertest.cc",