[mojo-edk] Add MojoWatch and MojoCancelWatch APIs

mojo/edk/system/BUILD.gn

 # Copyright 2014 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("../../../mojo/public/tools/bindings/mojom.gni")
 
 if (is_android) {
   import("//build/config/android/config.gni")
   import("//build/config/android/rules.gni")
@@ skipping 52 matching lines @@
     "ports_message.cc",
     "ports_message.h",
     "remote_message_pipe_bootstrap.cc",
     "remote_message_pipe_bootstrap.h",
     "shared_buffer_dispatcher.cc",
     "shared_buffer_dispatcher.h",
     "wait_set_dispatcher.cc",
     "wait_set_dispatcher.h",
     "waiter.cc",
     "waiter.h",
+    "watcher_set.cc",
+    "watcher_set.h",
   ]
 
   defines = [
     "MOJO_SYSTEM_IMPL_IMPLEMENTATION",
     "MOJO_SYSTEM_IMPLEMENTATION",
   ]
 
   all_dependent_configs = [ ":system_config" ]
 
   public_deps = [
@@ skipping 57 matching lines @@
     "data_pipe_unittest.cc",
     "message_pipe_unittest.cc",
     "options_validation_unittest.cc",
     "platform_handle_dispatcher_unittest.cc",
     "shared_buffer_dispatcher_unittest.cc",
     "shared_buffer_unittest.cc",
     "wait_set_dispatcher_unittest.cc",
     "waiter_test_utils.cc",
     "waiter_test_utils.h",
     "waiter_unittest.cc",
+    "watch_unittest.cc",
   ]
 
   if (!is_ios) {
     sources += [ "multiprocess_message_pipe_unittest.cc" ]
   }
 
   deps = [
     ":test_utils",
     "//base",
     "//base/test:test_support",
@@ skipping 17 matching lines @@
     ":test_utils",
     "//base",
     "//base/test:test_support",
     "//mojo/edk/system",
     "//mojo/edk/test:run_all_perftests",
     "//mojo/edk/test:test_support",
     "//mojo/public/cpp/environment:standalone",
     "//testing/gtest",
   ]
 }