Remove dependency of infobars component on the embedder

components/infobars/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.
 
 source_set("test_support") {
   testonly = true
 
   sources = [
-    "infobar_test.cc",
+    "test_confirm_infobar_delegate_factory.cc",
+    "test_confirm_infobar_delegate_factory.h",
   ]
 
   deps = [
     "//base",
     "//components/infobars/core",
     "//skia",
   ]
 }