Revert of Delete unused TaskRunner abstraction.

webrtc/base/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/crypto.gni")
 import("//build/config/ui.gni")
@@ skipping 330 matching lines @@
   if (is_win && is_clang) {
     cflags = [
       # Disable warnings failing when compiling with Clang on Windows.
       # https://bugs.chromium.org/p/webrtc/issues/detail?id=5366
       "-Wno-sign-compare",
       "-Wno-missing-braces",
     ]
   }
 }
 
+# TODO(nisse): This target is temporarily split out, to aid moving the
+# code over to Chrome. It should be deleted from webrtc soon.
+rtc_static_library("rtc_task_runner") {
+  sources = [
+    "task.cc",
+    "task.h",
+    "taskparent.cc",
+    "taskparent.h",
+    "taskrunner.cc",
+    "taskrunner.h",
+  ]
+}
+
 rtc_static_library("rtc_base") {
   cflags = []
   cflags_cc = []
   libs = []
   defines = []
   deps = [
     "..:webrtc_common",
   ]
   public_deps = [
     ":rtc_base_approved",
@@ skipping 489 matching lines @@
       "rollingaccumulator_unittest.cc",
       "rtccertificate_unittest.cc",
       "rtccertificategenerator_unittest.cc",
       "scopedptrcollection_unittest.cc",
       "sha1digest_unittest.cc",
       "sharedexclusivelock_unittest.cc",
       "signalthread_unittest.cc",
       "sigslot_unittest.cc",
       "sigslottester_unittest.cc",
       "stream_unittest.cc",
+      "task_unittest.cc",
       "testclient_unittest.cc",
       "thread_unittest.cc",
     ]
     if (is_win) {
       sources += [
         "win32_unittest.cc",
         "win32window_unittest.cc",
       ]
     }
     if (is_mac) {
       sources += [ "macutils_unittest.cc" ]
     }
     if (is_posix) {
       sources += [
         "ssladapter_unittest.cc",
         "sslidentity_unittest.cc",
         "sslstreamadapter_unittest.cc",
       ]
     }
     deps = [
       ":rtc_base_tests_main",
+      ":rtc_task_runner",
     ]
     public_deps = [
       ":rtc_base",
     ]
     configs += [ ":rtc_base_unittests_config" ]
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
   }
 }
 
 if (is_android) {
   android_library("base_java") {
     java_files = [
       "java/src/org/webrtc/Logging.java",
       "java/src/org/webrtc/Size.java",
       "java/src/org/webrtc/ThreadUtils.java",
     ]
   }
 }