Add media remoting unittests to media_unittests.

media/remoting/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")
 import("//third_party/protobuf/proto_library.gni")
 
 proto_library("media_remoting_proto") {
   proto_out_dir = "media/remoting"
   sources = [
@@ skipping 25 matching lines @@
     "remoting_renderer_factory.cc",
     "remoting_renderer_factory.h",
   ]
   deps = [
     "//base",
     "//media",
     "//media/mojo/interfaces:remoting",
   ]
 }
 
-test("media_remoting_unittests") {
+source_set("media_remoting_tests") {
+  testonly = true
   sources = [
     "remoting_controller_unittest.cc",
     "rpc/proto_utils_unittest.cc",
   ]
 
   deps = [
     ":remoting",
     ":rpc",
     "//base",
     "//base/test:test_support",
     "//media",
     "//media/mojo/interfaces:remoting",
-    "//mojo/edk/test:run_all_unittests",
     "//testing/gmock",
     "//testing/gtest",
     "//ui/gfx:test_support",
     "//ui/gfx/geometry",
   ]
 }
+
+test("media_remoting_unittests") {
+  deps = [
+    ":media_remoting_tests",
+    "//media/test:run_all_unittests",
+  ]
+}