chromeos, GN: make it possible to build many 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 406 matching lines @@
   }
 
   if (is_ios || is_win || (is_linux && !is_chromeos)) {
     deps += [
       "//base:base_i18n_perftests",
       "//base:base_perftests",
       "//google_apis:google_apis_unittests",
     ]
   }
 
-  if (is_android || is_win || (is_linux && !is_chromeos)) {
+  if (is_android || is_win || is_linux) {
     deps += [
       "//base:build_utf8_validator_tables",
       "//base:check_example",
       "//cc:cc_perftests",
       "//cc/blink:cc_blink_unittests",
       "//components:components_perftests",
       "//device:device_unittests",
       "//gin:gin_shell",
       "//gin:gin_unittests",
       "//google_apis/gcm:mcs_probe",
@@ skipping 13 matching lines @@
     if (!is_android) {
       deps += [
         "//chrome/test:load_library_perf_tests",
         "//chrome/test:sync_performance_tests",
         "//chrome/test/chromedriver:chromedriver",
         "//chrome/test/chromedriver:chromedriver_tests",
         "//courgette:courgette",
         "//courgette:courgette_fuzz",
         "//courgette:courgette_minimal_tool",
         "//courgette:courgette_unittests",
-        "//media/cast:generate_barcode_video",
-        "//media/cast:generate_timecode_audio",
         "//net:crash_cache",
         "//net:crl_set_dump",
         "//net:dns_fuzz_stub",
         "//net:gdig",
         "//net:get_server_time",
         "//net:net_watcher",  # TODO(GYP): This should be conditional on use_v8_in_net
         "//net:run_testserver",
         "//net:stress_cache",
         "//net:tld_cleanup",
         "//ppapi:pepper_hash_for_uma",
         "//ppapi:ppapi_perftests",
         "//third_party/angle/src/tests:angle_unittests",
         "//third_party/leveldatabase:env_chromium_unittests",
         "//third_party/libaddressinput:libaddressinput_unittests",
       ]
+      if (!is_chromeos) {
+        deps += [
+          "//media/cast:generate_barcode_video",
+          "//media/cast:generate_timecode_audio",
+        ]
+      }
     }
     if (!is_android && !is_linux) {
       # TODO(dpranke): Re-enable this once
       # https://chromium-review.googlesource.com/#/c/312298/1 is rolled
       # into chromium.
       deps += [ "//third_party/angle/src/tests:angle_end2end_tests" ]
     }
 
     if (enable_extensions) {
       deps += [ "//extensions/shell:app_shell" ]
@@ skipping 156 matching lines @@
     deps += [
       "//components/mus/demo",
       "//components/mus/ws:tests",
       "//mash:all",
       "//media/mojo/services:media_mojo_shell_unittests",
       "//mojo",
       "//ui/views/mus:views_mus_unittests",
     ]
   }
 
-  if (is_linux && !is_chromeos && !is_chromecast) {
+  if (is_linux && !is_chromecast) {
     # TODO(GYP): Figure out if any of these should be in gn_all
     # and figure out how cross-platform they are
     deps += [
       ":gn_mojo_targets",
       "//chrome/browser/resources:extension_resource_demo",
       "//chrome/installer/util:strings",
       "//chrome/tools/convert_dict",
       "//components/constrained_window:unit_tests",
       "//components/filesystem:filesystem_service_unittests",
       "//components/leveldb:leveldb_service_unittests",
       "//components/metrics:serialization",
       "//components/password_manager/content/renderer:browser_tests",
       "//components/rappor:unit_tests",
       "//components/sessions:unit_tests",
       "//media/blink:media_blink_unittests",
-      "//media/cast:udp_proxy",
       "//native_client/src/trusted/debug_stub:gdb_rsp_unittest",
       "//storage/browser:dump_file_system",
       "//third_party/angle:libANGLE",
       "//third_party/angle:libEGL",
       "//third_party/angle:libGLESv2",
       "//third_party/cld_2:cld_2_dynamic_data_tool",
       "//third_party/leveldatabase:leveldb_arena_test",
       "//third_party/leveldatabase:leveldb_bloom_test",
       "//third_party/leveldatabase:leveldb_cache_test",
       "//third_party/leveldatabase:leveldb_corruption_test",
@@ skipping 31 matching lines @@
       "//third_party/opus:test_opus_encode",
       "//third_party/opus:test_opus_padding",
       "//third_party/pdfium/third_party:fx_freetype",
       "//third_party/webrtc/system_wrappers:field_trial_default",
       "//third_party/webrtc/system_wrappers:metrics_default",
       "//ui/display/types",
       "//ui/shell_dialogs:shell_dialogs_unittests",
       "//ui/views/examples:views_examples_exe",
     ]
 
+    if (!is_chromeos) {
+      deps += [ "//media/cast:udp_proxy" ]

[dshwang, 2016/05/11 10:07:20]

cast has unresolved dependencies issues.
ERROR Unresolved dependencies.
//:gn_only(//build/toolchain/linux:clang_x64)
  needs //media/cast:udp_proxy(//build/toolchain/linux:clang_x64)

[Dirk Pranke, 2016/05/13 18:53:54]

Do you mean that udp_proxy has unresolved dependencies when is_chromeos is true?
Should that be fixed?

[dshwang, 2016/05/18 15:14:42]

correct. I didn't investigate how to fix it, but it should.

+    }
     if (target_cpu == "x86" || target_cpu == "x64") {
       if (!is_android) {
         deps += [ "//chrome/test:load_library_perf_tests" ]
       }
       deps += [
         "//native_client/src/trusted/platform_qualify:vcpuid",
         "//third_party/libjpeg_turbo:simd_asm",
       ]
     }
     if (is_linux && current_toolchain == host_toolchain) {
@@ skipping 214 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" ]
 }