Add display_compositor unittests into components_unittests

BUILD.gn

 # Copyright (c) 2013 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.
 
 # This is the root build file for GN. GN will start processing by loading this
 # file, and recursively load all dependencies until all dependencies are either
 # resolved or known not to exist (which will cause the build to fail). So if
 # you add a new build file, there must be some path of dependencies from this
 # file to your new one or GN won't know about it.
 
@@ skipping 413 matching lines @@
     ]
   }
 
   if (is_android || is_win || (is_linux && !is_chromeos)) {
     deps += [
       "//base:build_utf8_validator_tables",
       "//base:check_example",
       "//cc:cc_perftests",
       "//cc/blink:cc_blink_unittests",
       "//components:components_perftests",
-      "//components/display_compositor:display_compositor_unittests",
       "//device:device_unittests",
       "//gin:gin_shell",
       "//gin:gin_unittests",
       "//google_apis/gcm:mcs_probe",
       "//gpu:gl_tests",
       "//gpu:gpu_perftests",
       "//ipc:ipc_perftests",
       "//media:media_perftests",
       "//net:dump_cache",
       "//sync:run_sync_testserver",
@@ skipping 507 matching lines @@
   assert(target_name != "")  # Mark as used.
   sources = invoker.actual_sources
   assert(
       sources == invoker.actual_sources,
       "Do not use a platform name in your output directory (found \"$root_build_dir\"). http://crbug.com/548283")
 }
 
 assert_valid_out_dir("_unused") {
   actual_sources = [ "$root_build_dir/foo" ]
 }