Views: Add two disabled tests for invoking the CC unmask prompt dialog.

ui/base/BUILD.gn

Index: ui/base/BUILD.gn
diff --git a/ui/base/BUILD.gn b/ui/base/BUILD.gn
index 75e2d1cb7b0f393eb81f25e2f40adec94512c40b..1cc0c0170fc9e3eb0231ebde48662664cb4a4370 100644
--- a/ui/base/BUILD.gn
+++ b/ui/base/BUILD.gn
@@ -627,6 +627,7 @@ static_library("test_support") {
     "test/ui_controls_internal_win.h",
     "test/ui_controls_mac.mm",
     "test/ui_controls_win.cc",
+    "test/user_interactive_test_case.h",
   ]
 
   if (!is_ios) {
@@ -655,6 +656,12 @@ static_library("test_support") {
     ]
   }
 
+  if (is_mac) {
+    sources += [ "test/user_interactive_test_case_mac.mm" ]
+  } else {
+    sources += [ "test/user_interactive_test_case.cc" ]
+  }
+
   public_deps = [
     ":base",
   ]