GN build rules for all unit test targets in mojo/

mojo/services/view_manager/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.
 
 import("//mojo/system.gni")
 
 # GYP version: mojo/mojo_services.gypi:mojo_view_manager
 component("view_manager") {
   deps = [
     "//base",
@@ skipping 50 matching lines @@
     "view_manager_init_service_impl.cc",
     "view_manager_init_service_impl.h",
     "view_manager_service_impl.cc",
     "view_manager_service_impl.h",
     "window_manager_access_policy.cc",
     "window_manager_access_policy.h",
     "window_tree_host_impl.cc",
     "window_tree_host_impl.h",
   ]
 }
+
+# GYP version: mojo/mojo_services.gypi:mojo_view_manager_unittests
+test("mojo_view_manager_unittests") {
+  deps = [
+    "//base",
+    "//base/test:test_support",
+    "//mojo/application_manager",
+    "//mojo/environment:chromium",
+    "//mojo/public/cpp/application:chromium",
+    "//mojo/services/public/cpp/input_events",
+    "//mojo/services/public/cpp/geometry",
+    "//mojo/services/public/cpp/view_manager",
+    "//mojo/services/public/cpp/view_manager/lib:run_unittests",
+    "//mojo/services/public/cpp/view_manager:common",
+    "//mojo/services/public/interfaces/input_events",
+    "//mojo/services/public/interfaces/geometry",
+    "//mojo/services/public/interfaces/view_manager",
+    "//mojo/shell:test_support",
+    "//mojo/system",
+    "//skia",
+    "//testing/gtest",
+    "//ui/aura",
+    "//ui/gfx/geometry",
+    "//ui/gl",
+  ]
+
+  sources = [
+    "test_change_tracker.cc",
+    "test_change_tracker.h",
+    "view_manager_unittest.cc",
+  ]
+}