Add an end-to-end test that excercises Mojo with a sandbox.

content/shell/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("//build/config/features.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/ui.gni")
 import("//build/config/win/console_app.gni")
 import("//build/config/win/manifest.gni")
 import("//media/media_options.gni")
@@ skipping 158 matching lines @@
     "renderer/layout_test/leak_detector.cc",
     "renderer/layout_test/leak_detector.h",
     "renderer/layout_test/test_media_stream_renderer_factory.cc",
     "renderer/layout_test/test_media_stream_renderer_factory.h",
     "renderer/layout_test/test_video_frame_provider.cc",
     "renderer/layout_test/test_video_frame_provider.h",
     "renderer/shell_content_renderer_client.cc",
     "renderer/shell_content_renderer_client.h",
     "renderer/shell_render_view_observer.cc",
     "renderer/shell_render_view_observer.h",
+    "utility/mojo_test_impl.cc",
+    "utility/mojo_test_impl.h",
     "utility/shell_content_utility_client.cc",
     "utility/shell_content_utility_client.h",
   ]
 
   configs += [
     ":content_shell_lib_warnings",
     "//build/config:precompiled_headers",
 
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
     "//build/config/compiler:no_size_t_to_int_warning",
@@ skipping 21 matching lines @@
     "//components/crash/content/app:app_breakpad_mac_win_to_be_deleted",
     "//components/devtools_discovery",
     "//components/devtools_http_handler",
     "//components/plugins/renderer",
     "//components/test_runner:test_runner",
     "//components/url_formatter",
     "//components/web_cache/renderer",
     "//content:resources",
     "//content/app/resources",
     "//content/app/strings",
+    "//content/common:mojo_bindings",
     "//content/gpu",
     "//content/test:layouttest_support",
     "//device/bluetooth",
     "//device/bluetooth:mocks",
     "//gin",
     "//gpu",
     "//ipc",
     "//media",
     "//net",
     "//net:net_resources",
@@ skipping 280 matching lines @@
     sources = [
       "app/shell_content_main.cc",
       "app/shell_content_main.h",
     ]
 
     deps = [
       ":content_shell_lib",
     ]
   }
 }