Create Tether Chrome OS component and add a skeleton Initializer class.

chromeos/components/BUILD.gn

Index: chromeos/components/BUILD.gn
diff --git a/chromeos/components/BUILD.gn b/chromeos/components/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..f4689638c30ce182742f30d7331441fb0998d2e5
--- /dev/null
+++ b/chromeos/components/BUILD.gn
@@ -0,0 +1,26 @@
+# 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")
+
+assert(is_chromeos, "Non-ChromeOS builds cannot depend on //chromeos")
+
+static_library("components") {
+  deps = [
+    "//chromeos/components/tether",
+  ]
+}

[stevenjb, 2016/12/02 00:04:19]

Rather than package all of the components as a single library, we should provide
each component separately. This should just package the unit tests. (Note that
//components/BUILD.gn only provides tests).

i.e. just remove this section, then add //chromeos/components/tether to chome
(or whatever uses this) deps, instead of adding /chromeos/components.

[Kyle Horimoto, 2016/12/02 00:17:47]

Done.

+
+# To add a unit test to this target, make a "unit_test" source_set in your
+# component and add a reference here.
+test("chromeos_components_unittests") {
+  sources = [
+    "run_all_unittests.cc",
+  ]
+
+  deps = [
+    "//base",
+    "//chromeos/components/tether:unit_tests",
+  ]
+}