GN threading refactor

tools/gn/secondary/base/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.
 
 config("base_libs") {
   if (!is_win) {
     libs = [ "dl" ]
   }
 }
 
@@ skipping 242 matching lines @@
     "mac/scoped_nsautorelease_pool.h",
     "mac/scoped_nsautorelease_pool.mm",
     "mac/scoped_nsexception_enabler.h",
     "mac/scoped_nsexception_enabler.mm",
     "mac/scoped_nsobject.h",
     "mac/scoped_sending_event.h",
     "mac/scoped_sending_event.mm",
     "mac/sdk_forward_declarations.h",
     "memory/aligned_memory.cc",
     "memory/aligned_memory.h",
-    "memory/discardable_memory.cc",
     "memory/discardable_memory.h",
     "memory/discardable_memory_android.cc",
     "memory/discardable_memory_mac.cc",
     "memory/linked_ptr.h",
     "memory/manual_constructor.h",
     "memory/memory_pressure_listener.cc",
     "memory/memory_pressure_listener.h",
     "memory/raw_scoped_refptr_mismatch_checker.h",
     "memory/ref_counted.cc",
     "memory/ref_counted.h",
@@ skipping 599 matching lines @@
 # TODO(brettw) move to base/test.
 static_library("test_support_base") {
   external = true
   sources = [
     "test/expectations/expectation.cc",
     "test/expectations/expectation.h",
     "test/expectations/parser.cc",
     "test/expectations/parser.h",
     "test/gtest_xml_util.cc",
     "test/gtest_xml_util.h",
-    "test/launcher/parallel_test_launcher.cc",
-    "test/launcher/parallel_test_launcher.h",
     "test/launcher/test_launcher.cc",
     "test/launcher/test_launcher.h",
     "test/launcher/test_result.cc",
     "test/launcher/test_result.h",
     "test/launcher/test_results_tracker.cc",
     "test/launcher/test_results_tracker.h",
     "test/launcher/unit_test_launcher.cc",
     "test/launcher/unit_test_launcher.h",
     "test/launcher/unit_test_launcher_ios.cc",
     "test/mock_chrome_application_mac.h",
@@ skipping 121 matching lines @@
 static_library("run_all_unittests") {
   external = true
   sources = [
     "test/run_all_unittests.cc",
   ]
   deps = [
     ":test_support_base",
   ]
 }