mandoline: write this after lunch.

mash/wm/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("//build/config/ui.gni")
 import("//mojo/public/mojo_application.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 
 group("wm") {
   testonly = true
@@ skipping 30 matching lines @@
   deps = [
     "//base",
     "//components/mus/common",
     "//components/mus/public/cpp",
     "//components/mus/public/interfaces",
     "//mash/wm/public/interfaces",
     "//mojo/application/public/cpp",
     "//mojo/common:common_base",
     "//mojo/converters/geometry",
     "//mojo/converters/input_events",
+    "//mojo/services/tracing/public/cpp",
     "//skia",
     "//ui/mojo/init",
     "//ui/views",
     "//ui/views/mus:for_mojo_application",
   ]
 }
 
 mojo_native_application("example_wm") {
   sources = [
     "main.cc",
@@ skipping 59 matching lines @@
     "//mojo/public/cpp/system",
     "//testing/gtest",
     "//third_party/mojo/src/mojo/edk/system",
     "//ui/events",
     "//ui/gfx/geometry",
     "//ui/gfx:test_support",
     "//ui/mojo/geometry:interfaces",
     "//ui/mojo/geometry:util",
   ]
 }