Readd the clipboard service and get it compiling again.

components/clipboard/BUILD.gn

Index: components/clipboard/BUILD.gn
diff --git a/components/clipboard/BUILD.gn b/components/clipboard/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..7526a1f5b8a9bd8a27a4d89ed56faa62b89cee8c
--- /dev/null
+++ b/components/clipboard/BUILD.gn
@@ -0,0 +1,73 @@
+# 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("//mojo/public/mojo_application.gni")
+import("//mojo/public/mojo_application_manifest.gni")
+import("//testing/test.gni")
+
+source_set("lib") {
+  sources = [
+    "clipboard_application_delegate.cc",
+    "clipboard_application_delegate.h",
+    "clipboard_standalone_impl.cc",
+    "clipboard_standalone_impl.h",
+  ]
+
+  deps = [
+    "//base",
+    "//components/clipboard/public/interfaces",
+    "//mojo/public/cpp/bindings",
+    "//mojo/public/cpp/bindings:callback",
+    "//services/shell/public/cpp",
+    "//services/tracing/public/cpp",
+  ]
+}
+
+mojo_native_application("clipboard") {
+  sources = [
+    "main.cc",
+  ]
+
+  deps = [
+    ":lib",
+    "//base",
+    "//mojo/public/cpp/bindings:callback",
+    "//services/shell/public/cpp",
+  ]
+
+  data_deps = [
+    ":manifest",
+  ]
+}
+
+mojo_application_manifest("manifest") {
+  application_name = "clipboard"
+  source = "manifest.json"
+}
+
+test("clipboard_service_unittests") {
+  sources = [
+    "clipboard_unittest.cc",
+  ]
+
+  deps = [
+    "//base",
+    "//components/clipboard/public/interfaces",
+    "//mojo/common",
+    "//services/shell/public/cpp:shell_test_support",
+    "//services/shell/public/cpp:sources",
+    "//services/shell/public/cpp/test:run_all_shelltests",
+  ]
+
+  data_deps = [
+    ":test_manifest",
+    ":clipboard",
+  ]
+}
+
+mojo_application_manifest("test_manifest") {
+  type = "exe"
+  application_name = "clipboard_service_unittests"
+  source = "test_manifest.json"
+}