Add display_compositor unittests into components_unittests

components/display_compositor/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("//testing/test.gni")
 
 component("display_compositor") {
   sources = [
     "buffer_queue.cc",
     "buffer_queue.h",
@@ skipping 14 matching lines @@
     "//base",
     "//cc",
     "//gpu/command_buffer/client",
     "//gpu/command_buffer/client:gles2_interface",
     "//gpu/command_buffer/common",
     "//skia",
     "//ui/gfx",
   ]
 }
 
-test("display_compositor_unittests") {
+source_set("unit_tests") {
+  testonly = true
   sources = [
     "buffer_queue_unittest.cc",
-    "display_compositor_test_suite.cc",

[Fady Samuel, 2016/05/03 18:03:44]

Do we still need these files?

[Peng, 2016/05/03 18:10:36]

They are still used by display_compositor_benchmark. 

-    "display_compositor_test_suite.h",
     "gl_helper_unittest.cc",
-    "run_all_unittests.cc",
     "yuv_readback_unittest.cc",
   ]
 
+  if (!use_aura && !is_mac) {
+    sources -= [ "buffer_queue_unittest.cc" ]
+  }
+
   configs += [
     "//build/config/compiler:no_size_t_to_int_warning",
     "//third_party/khronos:khronos_headers",
   ]
 
   deps = [
     ":display_compositor",
     "//base",
     "//base/test:test_support",
     "//cc:test_support",
@@ skipping 37 matching lines @@
     "//skia",
     "//testing/gmock",
     "//testing/gtest",
     "//ui/gl:test_support",
   ]
 
   data_deps = [
     "//third_party/mesa:osmesa",
   ]
 }