mandoline: Set up WebViewTest and add a basic test.

components/web_view/BUILD.gn

 # Copyright 2015 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/public/mojo_application.gni")
 
 source_set("switches") {
   sources = [
     "web_view_switches.cc",
     "web_view_switches.h",
@@ skipping 71 matching lines @@
     "//base",
   ]
 }
 
 mojo_native_application("apptests") {
   output_name = "web_view_apptests"
   testonly = true
 
   sources = [
     "frame_apptest.cc",
+    "web_view_apptest.cc",
   ]
 
   deps = [
     ":lib",
     ":test_support",
     "//base",
     "//base/test:test_config",
     "//components/view_manager/public/cpp",
+    "//components/view_manager/public/cpp/tests:test_support",
     "//components/view_manager/public/interfaces",
+    "//components/web_view/public/cpp",
     "//components/web_view/public/interfaces",
     "//mojo/application/public/cpp:sources",
     "//mojo/application/public/cpp:test_support",
+    "//mojo/util:filename_util",
     "//ui/mojo/geometry:interfaces",
     "//ui/mojo/geometry:util",
+    "//url:url",
   ]
 
   data_deps = [ "//components/view_manager" ]
 }