Converts WindowTreeClientTest to be in terms of aura

services/ui/public/cpp/tests/BUILD.gn

Index: services/ui/public/cpp/tests/BUILD.gn
diff --git a/services/ui/public/cpp/tests/BUILD.gn b/services/ui/public/cpp/tests/BUILD.gn
index 6bc6e6bef6b9ff2bcaddf55c6bd269362ce523e3..11e5a1d890acf72d54c64cec71db4c52ebe43d98 100644
--- a/services/ui/public/cpp/tests/BUILD.gn
+++ b/services/ui/public/cpp/tests/BUILD.gn
@@ -29,29 +29,6 @@ static_library("unittest_support") {
   ]
 }
 
-static_library("test_support") {
-  testonly = true
-
-  sources = [
-    "window_server_shelltest_base.cc",
-    "window_server_shelltest_base.h",
-    "window_server_test_base.cc",
-    "window_server_test_base.h",
-  ]
-
-  deps = [
-    "//base",
-    "//base/test:test_config",
-    "//services/service_manager/public/cpp:service_test_support",
-    "//services/service_manager/public/cpp:sources",
-    "//services/ui/common:mus_common",
-    "//services/ui/public/cpp",
-    "//testing/gtest",
-    "//ui/display:test_support",
-    "//ui/gl",
-  ]
-}
-
 test("mus_public_unittests") {
   sources = [
     "property_type_converters_unittest.cc",