Add more test binaries to GN Mac build.

content/test/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build_overrides/v8.gni")
 import("//media/media_options.gni")
@@ skipping 64 matching lines @@
       "//media",
       "//mojo/application/public/cpp:cpp_for_chromium",
       "//mojo/environment:chromium",
       "//ppapi/host",
       "//ppapi/proxy",
       "//ppapi/proxy:test_support",
       "//ppapi/shared_impl",
       "//ppapi/shared_impl:test_support",
       "//storage/browser",
       "//storage/common",
+      "//ui/compositor:test_support",
       "//ui/surface",
       "//v8",
     ]
 
     if (enable_plugins) {
       deps += [ "//content/ppapi_plugin" ]
     }
 
     if (enable_webrtc) {
       sources += [
@@ skipping 699 matching lines @@
       "//testing/gtest",
       "//third_party/WebKit/public:blink",
       "//ui/base",
       "//ui/gfx",
       "//ui/gfx/geometry",
       "//ui/gl",
       "//ui/gl:test_support",
     ]
   }
 }