Scale client area, hit test mask and bounds by device_scale_factor.

services/ui/demo/BUILD.gn

 # Copyright 2016 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("//services/service_manager/public/cpp/service.gni")
 import("//services/service_manager/public/service_manifest.gni")
 import("//testing/test.gni")
 
 source_set("lib") {
+  testonly = true
+
   sources = [
     "bitmap_uploader.cc",
     "bitmap_uploader.h",
     "mus_demo.cc",
     "mus_demo.h",
   ]
 
   public_deps = [
     "//services/service_manager/public/cpp:sources",
     "//skia",
   ]
 
   deps = [
     "//base",
     "//mojo/public/cpp/bindings",
     "//services/service_manager/public/cpp",
     "//services/ui/public/cpp",
     "//services/ui/public/cpp:internal",
     "//services/ui/public/interfaces",
+    "//ui/display:test_support",
     "//ui/gfx/geometry",
   ]
 }
 
 service("mus_demo") {
+  testonly = true
+
   sources = [
     "main.cc",
   ]
 
   deps = [
     ":lib",
   ]
 
   data_deps = [
     ":manifest",
@@ skipping 28 matching lines @@
     "//testing/gtest",
   ]
 
   data_deps = [
     ":mus_demo",
     ":test_manifest",
   ]
 }
 
 group("demo") {
+  testonly = true
+
   deps = [
     ":mus_demo",
   ]
 }